John Calvin believed that Scripture is necessary for human understanding of God's revelation, that it is the equivalent of direct revelation, and that it is both "majestic" and "simple." Calvin's general, explicit exposition of his view of Scripture is found mainly in his Institutes of the Christian Religion.[1]
Calvin unfolds his doctrine of Scripture in Inst., Book I...
...Calvin's purpose with the Institutes was different from what it was in 1536. This difference in purpose has to do with the distinction he made between the Institutes and a commentary. ... In the letter preceding the Institutes of 1539, Calvin says that in a commentary he limits himself to the exposition of Scripture without giving a lengthy discussion of doctrinal matters. In the Institutes, however, he does go into doctrinal topics...
Calvin's over-arching theological enterprise revolved around two poles. The first is the Institutes, a summary of Christian doctrine and guide to the scriptures. The second was the collection of specific efforts at explication of the Bible, sermons, lectures, and commentaries.