Devotional 5: The Inward Witness: How the Spirit Seals Scripture to Our Hearts

We may be moved and induced by the testimony of the church to an high and reverent esteem of the Holy Scripture. And the heavenliness of the matter, the efficacy of the doctrine, the majesty of the style, the consent of all the parts, the scope of the whole (which is, to give all glory to God), the full discovery it makes of the only way of man's salvation, the many other incomparable excellencies, and the entire perfection thereof, are arguments whereby it doth abundantly evidence itself to be the Word of God: yet notwithstanding, our full persuasion and assurance of the infallible truth and divine authority thereof, is from the inward work of the Holy Spirit bearing witness by and with the Word in our hearts.

— Westminster Confession of Faith, Chapter 1, Section 5

Introduction: How Do You Know the Bible Is God's Word?

It is one of the most important questions a Christian can face. You hold a book in your hands — a collection of ancient writings, translated across centuries and cultures. You are told it is the Word of God. But how do you know? Upon what foundation does your certainty rest? In Section 4 we saw that the authority of Scripture does not depend on the testimony of any man or church, but wholly upon God its Author. But that raises a further question: how does a human being come to know this authority? By what means does the soul arrive at a settled persuasion that the Bible is indeed the Word of the living God? This is the question the Westminster Divines address in the fifth section of the first chapter. It is a question that goes to the very heart of the Christian faith. For if we cannot be certain that the Bible is God's Word, then everything built upon it — our doctrine, our hope, our salvation — rests upon shifting sand. The Divines wrote with careful balance. They were steering between two dangerous cliffs. On one side was the Church of Rome, which taught that the Bible derives its authority from the church. On the other side were the Rationalists, who taught that human reason must sit in judgment over Scripture. Both errors, the Divines saw, ultimately undermine the authority of God's Word. Their answer is a masterpiece of Reformed theology. It acknowledges that there are real and powerful external evidences for the divine origin of Scripture. The testimony of the church, the majesty of its content, the harmony of its parts, the efficacy of its doctrine — these are not to be dismissed. They are "arguments whereby it doth abundantly evidence itself to be the Word of God." But — and this is the crucial point — these external arguments are not enough. They can bring us to a "high and reverent esteem" of Scripture. They can silence the objections of critics. But they cannot produce that "full persuasion and assurance" which is the foundation of saving faith. That comes only from "the inward work of the Holy Spirit bearing witness by and with the Word in our hearts." This is the great Reformed doctrine of the testimonium internum Spiritus Sancti — the internal testimony of the Holy Spirit. It is the crowning jewel of the Reformed doctrine of Scripture. Let us examine it carefully.

Scripture Foundation

The Westminster Divines did not invent this doctrine. They drew it from the clear teaching of Scripture itself, and they anchored their confession in the following proof texts. 1 John 5:9 — "If we receive the witness of men, the witness of God is greater: for this is the witness of God which he hath testified of his Son." The Apostle John here establishes a principle that runs through the whole of the Christian faith. We accept human testimony every day — in courts of law, in historical records, in the reports of trusted friends. If human testimony can be sufficient for the ordinary affairs of life, how much more is the testimony of God Himself sufficient for the eternal affairs of the soul! The Confession draws on this verse to establish that the ultimate ground of our assurance is not the church's testimony about Scripture, but God's own testimony in Scripture. As A.A. Hodge observed, "Truth which God testifies to and so is the author of, has infallible authority." 1 Thessalonians 2:13 — "For this cause also thank we God without ceasing, because, when ye received the word of God which ye heard of us, ye received it not as the word of men, but as it is in truth, the word of God, which effectually worketh also in you that believe." This verse is a living example of the testimonium internum in action. The Thessalonians did not merely accept Paul's preaching because of his eloquence or his credentials. They recognized it as the very voice of God speaking through him. The Puritan theologian Hugh Martin described this as "the living flash of identification" between the written word and the voice of the living God. It is one thing to believe that the Bible is true; it is another thing to receive it as what it truly is — the Word of God, not merely containing truth but wielding divine power in the soul. 2 Peter 1:19 — "We have also a more sure word of prophecy; whereunto ye do well that ye take heed, as unto a light that shineth in a dark place, until the day dawn, and the day star arise in your hearts." Peter had just witnessed the transfiguration of Christ. He had heard the voice of God from heaven: "This is my beloved Son, in whom I am well pleased." And yet he declares that we have a "more sure word of prophecy" — the written Scriptures. Why more sure? Because the written Word is permanent, public, and verifiable. It does not depend on the reliability of human memory or the vividness of human experience. The Greek word bebaioteron means "more firm, more certain." As the great Scottish theologian Hugh Martin argued, the Scripture is "more sure" because it is a divinely authored record, not a fleeting experience. Titus 1:2 — "In hope of eternal life, which God, that cannot lie, promised before the world began." The Greek word here is apseudes — "the God who cannot lie." This is the foundation of all assurance. If God cannot lie, then His Word must be true. The authority of Scripture does not rest on external proofs but on the character of its Author. Because God is truth itself, His Word carries its own authority. To doubt the Word is to doubt the God who speaks it. John 10:35 — "The scripture cannot be broken." Jesus spoke these words in the midst of a debate with the Pharisees. They had accused Him of blasphemy; He responded by quoting Psalm 82:6, and then declared that "the scripture cannot be broken." The Greek word lyo means "to loose, to dissolve, to destroy." Jesus is saying that Scripture possesses an indestructible divine authority. It cannot be set aside, it cannot be relativized, it cannot be broken. This is not a property that the church conferred upon Scripture; it is intrinsic to its nature as the Word of God. John 16:13-14 — "Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come. He shall glorify me: for he shall receive of mine, and shall shew it unto you." Here our Lord describes the Spirit's work in relation to the Word. Calvin comments on this passage that the Spirit's office is not to form new revelations but to "seal on our minds the very doctrine which the gospel recommends." The Spirit does not add to Scripture; He illuminates it. He does not supersede the Word; He confirms it. This is the perpetual work of the Spirit in the life of the believer — not giving new truth, but sealing the truth already given. 1 Corinthians 2:10-11 — "But God hath revealed them unto us by his Spirit: for the Spirit searcheth all things, yea, the deep things of God. For what man knoweth the things of a man, save the spirit of man which is in him? even so the things of God knoweth no man, but the Spirit of God." Paul here draws an analogy that is both simple and profound. Just as a man's inner thoughts are known only to his own spirit, so the deep things of God are known only to the Spirit of God. If we are to know the things of God — His thoughts, His purposes, His salvation — we must be taught by the Spirit who alone knows them. This is why the external evidences, however powerful, can never produce saving faith. Only the Spirit who inspired the Word can illuminate the Word to our hearts.

What the Divines Meant

The Two Enemies The Westminster Assembly faced two opposing errors concerning the authority of Scripture, and Section 5 is a carefully crafted response to both. On one side stood the Church of Rome. The Council of Trent had declared that the church has the authority to determine which books are Scripture and to interpret their meaning. The church, in the Roman view, stands over the Word. Rome taught that we believe the Bible because the church tells us to believe it — that the authority of Scripture depends upon the testimony of the church. The Divines rejected this utterly. The Confession had already declared in Section 4 that the authority of Scripture "dependeth not upon the testimony of any man, or church; but wholly upon God." In Section 5, they acknowledge that the testimony of the church can move and induce us to a high esteem of Scripture — but it cannot produce "full persuasion and assurance." A.A. Hodge on this point is characteristically precise. He writes: "If the Word of God be divine, merely because the church holds it forth, then it would follow that our faith is to be built upon the church, and not upon the Word." The Roman position, however well-intentioned, ultimately makes the church the foundation of faith rather than Christ speaking in Scripture. On the other side stood the Rationalists and Socinians. They taught that human reason must sit in judgment over Scripture. Whatever agreed with reason could be accepted; whatever contradicted reason must be rejected. In this view, reason stands over the Word. The Divines rejected this equally. Human reason, darkened by sin, is not competent to judge the Word of God. As Calvin wrote, "Profane men think that religion rests only on opinion, and therefore desire to have it proved by reason that Moses and the prophets were divinely inspired. But the testimony of the Spirit is superior to reason." The Via Media The Westminster doctrine is a middle path — what A.A. Hodge called the via media. Against Rome, it affirms that the church does not create the authority of Scripture; it only bears witness to it. Against Rationalism, it affirms that reason does not judge Scripture; it is judged by Scripture. But the Confession does more than merely deny errors. It positively affirms both the value of external evidences AND the necessity of the Spirit's internal witness. The external evidences — the testimony of the church, the majesty of Scripture's content, the efficacy of its doctrine, the harmony of its parts, the scope of the whole — are real and powerful. As Watson says, they are "cogent arguments" that can "silence gainsayers." But they are not enough. The Confession lists these external evidences with beautiful specificity: 1. The testimony of the church — not as the foundation of our faith, but as a legitimate inducement to esteem Scripture 2. The heavenliness of the matter — Scripture treats of heavenly things, not earthly speculation 3. The efficacy of the doctrine — the Word has power to convert, comfort, and transform 4. The majesty of the style — there is a divine dignity in the Scriptures that no human writing can match 5. The consent of all the parts — the sixty-six books, written over fifteen centuries by forty authors, yet speak with one voice 6. The scope of the whole — to give all glory to God 7. The full discovery of salvation — the Bible alone reveals the way of salvation 8. The incomparable excellencies — the manifold perfections of Scripture that exceed all human composition These are not to be despised. They are "arguments whereby it doth abundantly evidence itself to be the Word of God." Calvin calls them "secondary helps to our weakness." They have their place. But they are not the foundation. The Great Transition The crucial word in the Confession is "yet notwithstanding." After listing all the external evidences, the Divines turn to the true foundation: "Yet notwithstanding, our full persuasion and assurance of the infallible truth and divine authority thereof, is from the inward work of the Holy Spirit bearing witness by and with the Word in our hearts." This is the heart of the Reformed doctrine. Our certainty does not rest on the church's testimony, nor on rational arguments, nor on the internal excellencies of Scripture — though all of these have their place. It rests ultimately on the work of the Holy Spirit in our hearts, bearing witness to the Word. Robert Shaw, the Scottish divine whose exposition of the Confession remains a standard work, explains the distinction this way: There is a difference between historical faith and saving faith. Historical faith assents to the truth of Scripture on the basis of external evidence. It can be found in the unconverted. But saving faith — that "full persuasion and assurance" — is the work of the Spirit alone. As Shaw writes: "A man may be convinced that the Scriptures are true, and yet remain unconverted. But when the Spirit bears witness by and with the Word, the soul not only believes the truth of Scripture but receives it as the Word of God, submits to its authority, and rests upon its promises."

Theological Depth

John Calvin on the Inward Testimony of the Spirit Calvin's treatment of the testimonium internum Spiritus Sancti in the first book of his Institutes is the classic Reformed statement on this subject. He writes with a passion and clarity that has never been surpassed. Calvin begins by refusing both the Roman and the Rationalist positions. He will not ground the authority of Scripture in the decree of the church, for that would subject the truth of God to the will of men. Nor will he ground it in rational arguments alone, for "the testimony of the Spirit is more excellent than all reason." He then makes his great affirmation: "Let it therefore be held as fixed, that those who are inwardly taught by the Holy Spirit acquiesce implicitly in Scripture; that Scripture, carrying its own evidence along with it, deigns not to submit to proofs and arguments, but owes the full conviction with which we ought to receive it to the testimony of the Spirit." Calvin's language is striking. Scripture "deigns not to submit to proofs and arguments" — it is as if the Bible is a monarch who does not stoop to defend His credentials. It bears its own divine light, and the Spirit opens our eyes to see it. But Calvin does not despise the external evidences. He calls them "secondary helps to our weakness." They have their use in confirming our faith and silencing objections. But they are not the foundation. As he writes: "Still the human testimonies which go to confirm it will not be without effect, if they are used in subordination to that chief and highest proof." Calvin also insists that the Spirit and the Word are never to be separated. "The Lord has so knit together the certainty of his word and his Spirit, that our minds are duly imbued with reverence for the word when the Spirit shining upon it enables us there to behold the face of God." Those who despise the Word while claiming the Spirit are deluded enthusiasts. Those who study the Word without praying for the Spirit are dry rationalists. The Spirit speaks through the Word; the Word is the instrument of the Spirit. To separate them is to err on one side or the other. Thomas Watson on the Self-Authenticating Scripture Thomas Watson, in his Body of Divinity, gives us one of the most beautiful and accessible treatments of this doctrine. His language is warm and full of memorable images. Watson argues that Scripture is autopistos — self-authenticating. "The sun best discovers itself by its own beams," he writes. "Scripture interprets itself to the understanding." We do not need the church to tell us that the Bible is God's Word, any more than we need a candle to tell us that the sun is shining. The Scripture carries its own evidence. Watson then gives us his most striking image for the Spirit's work. "The Scripture is a spiritual telescope," he writes, "in which we behold God's glory; it is the tree of life, the oracle of wisdom, the rule of manners, the heavenly seed." A telescope does not create the stars; it brings them into focus for eyes that cannot see them clearly. So the Scripture does not create the knowledge of God; it brings it into focus for eyes darkened by sin. And the Spirit is the hand that adjusts the lens. Without the Spirit, the telescope is merely an instrument; with the Spirit, we see the glory of God. For Watson, the external evidences are real and powerful. He lists seven of them — the antiquity of Scripture, its miraculous preservation, its majesty and holiness, its harmony, its efficacy, the fulfillment of its prophecies, and the testimony of the martyrs. But these are not the ultimate ground of faith. They are helps for our weakness, signposts that point to the divine origin of Scripture. The certainty itself comes from the Spirit. A.A. Hodge on the Via Media A.A. Hodge, the great Princeton theologian, presents the Westminster doctrine as a carefully balanced middle path between two errors. Against the Roman Catholic position, Hodge insists that the church cannot confer authority upon Scripture. The church is "a witness and a keeper of Holy Writ" — it bears witness to the canon, but it does not create it. To say otherwise, Hodge argues, is to invert the proper order: "The truth of God would thus be subjected to the will of man." Against the Rationalist position, Hodge insists that reason cannot judge Scripture. Human reason, darkened by sin, is not competent to sit in judgment over the Word of God. Reason must be subject to Scripture, not the other way around. The true ground of assurance, Hodge argues, is the internal witness of the Spirit. He presents it as a syllogism: "The Word of God is the major factor in assurance, conscience is the minor factor, and the Spirit of God, the moving cause." The Word says, "He who fears and loves God is loved of God." Conscience says, "I fear and love God." The Spirit then applies this truth to the heart, producing assurance. Hodge also makes an important distinction between historical faith and saving faith. Historical faith is the intellectual assent to the truth of Scripture based on external evidence. It can exist in the unconverted. But saving faith is the full persuasion and assurance that comes from the Spirit's inward work. As Hodge writes: "A man who is destitute of the former is never the subject of the latter; the former is a preparative to the latter." B.B. Warfield on the Divine Authorship B.B. Warfield, whose name is synonymous with the Princeton doctrine of biblical inspiration, approaches the question of assurance through the lens of divine authorship. Warfield argues, following Hugh Martin, that the Westminster Confession's phrase — "it pleased the Lord to commit the same wholly unto writing" — means that God Himself is the Author of Scripture. The Bible is not merely a record of revelation; it is itself revelation, the very Word of God in written form. As Martin writes: "Divine authorship through the instrumentality of human authorship — that calls for inspiration; that is what inspiration effects." This is the foundation of our assurance. We do not believe the Bible because the church tells us to, or because we have been argued into submission by external evidences. We believe it because we recognize it for what it is — the Word of the living God. And this recognition comes not from human reasoning but from the Spirit's witness. Warfield insists that this is not a "private revelation" separate from Scripture. The Spirit does not whisper new truth into our ears; He bears witness "by and with the Word." The objective Word and the subjective work of the Spirit are always united. As Martin wrote: "Living faith is the living flash of identification of the written word with the voice of God." The Spirit and the Word: An Indissoluble Union The great Puritan theologian John Owen, in his monumental work The Divine Original of the Scripture, brings all of these threads together. Owen argues that the Scripture carries within itself the evidence of its own divinity. It does not need the church to authenticate it any more than the sun needs a candle to prove that it shines. But Owen also insists that this self-evidencing light of Scripture can only be seen by eyes that the Spirit has opened. "The light of the Scripture is like the light of the sun," Owen writes. "The sun does not need the testimony of any other light to prove that it shines. It is self-evidencing. So the Scripture, by its own light and power, manifests itself to the conscience as the Word of God." This is the great Reformed balance. The Word is objectively the Word of God, carrying its own authority. And the Spirit subjectively opens our eyes to recognize it as such. The two are never to be separated. Owen insists that those who seek the Spirit apart from the Word fall into enthusiasm; those who study the Word without seeking the Spirit's illumination fall into dead orthodoxy. The Spirit and the Word are knit together in an indissoluble union.

Puritan Application

Let us now bring these great truths down to the floor of our own souls. First, examine the ground of your faith. Why do you believe the Bible is the Word of God? Is it because your parents taught you so? Because your church tells you so? Because your pastor preaches it? These are good things, and God uses them. But if your faith rests only on human testimony, it will waver when that testimony wavers. The true ground of faith is the internal witness of the Holy Spirit. Have you experienced that witness? Have you known what it is to have the Spirit "bear witness by and with the Word" in your heart? This is not an experience for a select few; it is the birthright of every child of God. Second, use the external evidences, but do not rest in them. The Confession does not despise the external arguments for Scripture's divine origin. The majesty of its style, the harmony of its parts, the efficacy of its doctrine, the fulfillment of its prophecies — these are real and powerful. They can silence the objections of skeptics and confirm the faith of believers. But they cannot produce saving faith. As Calvin says, they are "secondary helps to our weakness." Use them as the Puritans did — as tools to strengthen faith, not as the foundation of faith. Third, never separate the Spirit from the Word. There are two equal and opposite errors that Christians have fallen into throughout the ages. Some have sought the Spirit apart from the Word — looking for new revelations, new prophecies, new words from the Lord beyond what is written. This is the path of enthusiasm. Others have studied the Word without seeking the Spirit — treating the Bible as a textbook to be mastered rather than a living Word to be received. This is the path of dead orthodoxy. The Reformed faith holds both together. As Calvin says, "The Lord has so knit together the certainty of his word and his Spirit, that our minds are duly imbued with reverence for the word when the Spirit shining upon it enables us there to behold the face of God." Fourth, seek the Spirit's illumination every time you open the Word. Before you read your Bible, pray. Ask the Spirit who inspired the Word to open your eyes to see its glory. Pray with the psalmist: "Open thou mine eyes, that I may behold wondrous things out of thy law." The same Spirit who moved the prophets and apostles to write must move in your heart to receive what they wrote. Without the Spirit, the Bible is a closed book. With the Spirit, it becomes the living voice of God. Fifth, test every spiritual experience by the Word. The Spirit does not speak apart from the Word. If you believe you have received a leading, a prompting, a revelation from the Spirit, test it by the Scriptures. Does it agree with what God has already revealed? The Spirit never contradicts Himself. As John Owen taught, the Spirit bears witness "by and with the Word" — never apart from it. If an experience or teaching leads you away from the Word, it is not from the Spirit of truth. Sixth, rest in the assurance that the Spirit's witness can give. One of the great comforts of the Reformed faith is that our assurance does not depend on our own reasoning or our own feelings. It depends on the work of the Holy Spirit. Thomas Watson has a word for troubled souls: "What is assurance? It is not any vocal or audible voice, or brought to us by the help of an angel or revelation. The Word of God is the major factor in assurance, conscience is the minor factor, and the Spirit of God, the moving cause." If you are struggling with doubt about the Bible, do not despair. Doubt is not the opposite of faith; it is often the tool that God uses to drive us to a deeper faith. Bring your doubts to the Word. Bring them to the Spirit in prayer. Ask God to seal upon your heart the truth of His Word. He who has begun a good work in you will carry it on to completion. The same Spirit who inspired the Scriptures is able to convince you of their truth. As Watson says, "When the finger of God's Spirit touches this instrument, it produces heavenly music in the soul." Let us therefore prize the Scriptures. Let us read them daily. Let us meditate upon them. Let us pray for the Spirit's illumination. And let us rest in the assurance that the Word we hold in our hands is indeed the Word of the living God, not because the church tells us so, nor because reason convinces us, but because the Spirit of God bears witness with our spirits that this book is from God.

Prayer

O Lord, who art the truth itself and canst not lie: we bless Thee for Thy holy Word, which Thou hast given to be the rule of our faith and life. We thank Thee for the testimony of the church throughout the ages, which has preserved and transmitted the Scriptures to us. We thank Thee for the heavenly majesty, the glorious harmony, and the saving efficacy of Thy Word, which abundantly evidence it to be from Thee. But above all, we thank Thee for the inward work of Thy Holy Spirit, who bears witness by and with the Word in our hearts. We confess that we have often rested our faith upon human testimony and rational arguments, when we should have looked to the Spirit alone for full persuasion and assurance. Grant us, we beseech Thee, the inward illumination of Thy Spirit, that we may hear Thy voice speaking in the Scriptures, and that our hearts may be transformed by the truth we find there. Open our eyes to behold the glory of Christ in the pages of Thy Word. Seal upon our hearts the certainty that this book is from Thee. Keep us from the error of those who seek the Spirit apart from the Word, and from those who study the Word without the Spirit. Knit together in our souls, as Thou hast done in Thy providence, the certainty of Thy Word and the witness of Thy Spirit. And when at last we shall see Thee face to face, and know even as we are known, may we bless Thee forever for the Word that led us to the Word made flesh, Jesus Christ our Lord, who with Thee and the Holy Ghost livest and reignest, one God, world without end. Amen.