This is from the Institutes, Book 1, chapter 5, section 4:
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?
I find it very interesting that, while Calvin wrote this back in the 1500's, it is still so true today. We have "monster minds" running around everywhere we look. Leaders in science, politics, society, and - God help us! - even in religion, who use the minds and intellect given by God to deny that He exists!
God knows the human heart inside and out and centuries ago, He inspired a man to write the book of Ecclesiastes which says:
That which has been is what will be,
That which is done is what will be done,
And there isnothing new under the sun.
Is there anything of which it may be said,
“See, this is new”?
It has already been in ancient times before us.
There is no remembrance of former things,
Nor will there be any remembrance of things that are to come
By those who will come after.
We are indeed a race of madmen...