As we come to the next set of questions and answers our Larger Catechism is interested in expanding on what we learned in the Shorter Catechism about the Bible. The Divines continue to explain how it is we know God, who He is, what He has done, is doing, and will do, as well as why it is we are to trust the book that tells us these things. Q/A #3 tells us what the word of God is, Q/A #4 testifies to the many ways in which the Bible not only is right and good, but exemplifies these things by its very nature, and Q/A #5 shows us why the Bible should matter to us.
Q. 3. What is the Word of God?
A. The Holy Scriptures of the Old and New Testament are the word of God, the only rule of faith and obedience.
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.
Q. 5. What do the Scriptures principally teach?
A. The scriptures principally teach, what man is to believe concerning God, and what duty God requires of Man.