Q. 4. How does it appear that the Scriptures are the Word of God?
A. The Scriptures manifest themselves to be the Word of God, by their majesty and purity; by the consent of all the parts, and the scope of the whole, which is to give all glory to God; by their light and power to convince and convert sinners, to comfort and build up believers unto salvation: but the Spirit of God bearing witness by and with the Scriptures in the heart of man, is alone able fully to persuade it that they are the very Word of God.
The words of the Lord are pure words: as silver tried in a furnace of earth, purified seven times.
—Psalm 12:6
The Psalmist now declares, that God is sure, faithful, and steadfast in his promises. But the insertion by the way of this commendation of the word of God would be to no purpose, if he had not first called himself, and other believers, to meditate on God’s promises in their afflictions. Accordingly, the order of the Psalmist is to be attended to, namely, that, after telling us how God gives to his servants the hope of speedy deliverance, even in their deepest distresses, he now adds, to support their faith and hope, that God promises nothing in vain, or for the purpose of disappointing man. This, at first sight, seems a matter of small importance; but if any person consider more closely and attentively how prone the minds of men are to distrust and ungodly doubtings, he will easily perceive how requisite it is for our faith to be supported by this assurance, that God is not deceitful, that he does not delude or beguile us with empty words, and that he does not magnify beyond all measure either his power or his goodness, but that whatever he promises in word he will perform in deed.
There is no man, it is true, who will not frankly confess that he entertains the same conviction which David here records, that the words of Jehovah are pure; but those who while lying in the shade and living at their ease liberally extol by their praises the truth of God’s word, when they come to struggle with adversity in good earnest, although they may not venture openly to pour forth blasphemies against God, often charge him with not keeping his word. Whenever he delays his assistance, we call in question his fidelity to his promises and murmur just as if he had deceived us. There is no truth which is more generally received among men than that God is true; but there are few who frankly give him credit for this when they are in adversity. It is, therefore, highly necessary for us to cut off the occasion of our distrust; and whenever any doubt respecting the faithfulness of God’s promises steals in upon us, we ought immediately to lift up against it this shield, that the words of the Lord are pure.
—John Calvin, Calvin’s Commentaries Volume IV, Commentary on the Book of Psalms, Volume I (Baker Books, 2009), 176–177.
Get your own copy of The Westminster Confession of Faith and Catechisms here.









