But herein appears the shameful ingratitude of men. Though they have in their own persons a factory where innumerable operations of God are carried on, and a magazine stored with treasures of inestimable value—instead of bursting forth in his praise, as they are bound to do, they, on the contrary, are the more inflated and swelled with pride. They feel how wonderfully God is working in them, and their own experience tells them of the vast variety of gifts which they owe to his liberality. Whether they will or not, they cannot but know that these are proofs of his Godhead, and yet they inwardly suppress them. They have no occasion to go farther than themselves, provided they do not, by appropriating as their own that which has been given them from heaven, put out the light intended to exhibit God clearly to their 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. Can any thing be more detestable than this madness in man, who, finding God a hundred times both in his body and his soul, makes his excellence in this respect a pretext for denying that there is a God? He will not say that chance has made him differ from the brutes that perish; but, substituting nature as the architect of the universe, he suppresses the name of God. The swift motions of the soul, its noble faculties and rare endowments, bespeak the agency of God in a manner which would make the suppression of it impossible, did not the Epicureans, like so many Cyclops, use it as a vantage-ground, from which to wage more audacious war with God. Are so many treasures of heavenly wisdom employed in the guidance of such a worm as man, and shall the whole universe be denied the same privilege? To hold that there are organs in the soul corresponding to each of its faculties, is so far from obscuring the glory of God, that it rather illustrates it. Let Epicurus tell what concourse of atoms, cooking meat and drink, can form one portion into refuse and another portion into blood, and make all the members separately perform their office as carefully as if they were so many souls acting with common consent in the superintendence of one body.
~ Institutes of the Christian Religion, Book 1, Chapter 5, Part 4, by John Calvin
How wicked is man to use the body that God gave us, and the breath with which He provides us life to claim not only that He does not exist, but that if He were to exist as the Bible describes that He is wicked and evil when compared to the consciences of men.