Many Monster Minds

At this day, however, the earth sustains on her bosom many monster minds - minds which are not afraid to employ the seed of deity deposited in human nature as a means of suppressing the name of God. (John Calvin, Institutes, Book 1, Chapter V)

That None Might Be Excluded

Since the perfection of blessedness consists in the knowledge of God, he has been pleased, in order that none might be excluded from the means of obtaining felicity, not only to deposit in our minds that seed of religion of which we have already spoken, but so to manifest his perfections in the whole structure of the universe, and daily place himself in our view, that we cannot open our eyes without being compelled to behold him. (John Calvin, Institutes, Book 1, Chapter V)

To Prevent Any Man From Pretending Ignorance

That there exists in the human mind, and indeed by natural instinct, some sense of Deity, we hold to be beyond dispute, since God Himself, to prevent any man from pretending ignorance, has endued all men with some idea of His Godhead, the memory of which He constantly renews and occasionally enlarges, that all to a man, being aware that there is a God, and that He is their Maker, may be condemned by their own conscience when they neither worship Him nor consecrate their lives to His service. (John Calvin, Institutes, Book 1, Chapter III)