Something dramatic happened in his perception of reality as he read the Scriptures for himself. He heard in them the voice of God and saw the majesty of God:
Now this power which is peculiar to Scripture is clear from the fact that, of human writings, however artfully polished, there is none capable of affecting us at all comparably. Read Demosthenes or Cicero; read Plato, Aristotle, and others of that tribe. They will, I admit, allure you, delight you, move you, enrapture you in wonderful measure. But betake yourself from them to this sacred reading. Then, in spite of yourself, so deeply will it affect you, so penetrate your heart, so fix itself in your very marrow, that, compared with its deep impressions, such vigor as the orators and philosophers have will nearly vanish. Consequently, it is easy to see that the Sacred Scriptures, which so far surpass all gifts and g races of human endeavor, breathe something divine.
After this discovery, Calvin was utterly bound to the Word of God.
The Bible is the very Word of God. He said:
The law and the prophecies are not teaching delivered by the will of men, but dictated by the Holy Ghost…. We owe the Scripture the same reverence which we owe to God, because it has proceeded from Him alone, and has nothing of man mixed with it.
Man never attain true Self Knowledge until he has previously contemplated the face of God, and came down after such a contemplation to look into himself. (Calvin)
Without knowledge of God there is no knowledge of self
It is evident that man never attains to a true self-knowledge until he have previously contemplated the face of God, and come down after such contemplation to look into himself. For (such is our innate pride) we always seem to ourselves just, and upright, and wise, and holy, until we are convinced, by clear evidence, of our injustice, vileness, folly, and impurity. Convinced, however, we are not, if we look to ourselves only, and not to the Lord also. (John Calvin)