"Though experience testifies that a seed of religion is divinely sown in all, scarcely one in a hundred is found who cherishes it in his heart, and not one in whom it grows to maturity, so far is it from yielding fruit in its season. Moreover, while some lose themselves in superstitious observances, and others, of set purpose, wickedly revolt from God, the result is that, in regard to the true knowledge of Him, all are so degenerate, that in no part of the world can genuine godliness be found.
In saying that some fall away into superstition, I mean not to insinuate that their excessive absurdity frees them from guilt; for the blindness under which they labor is almost invariably accompanied with vain pride and stubbornness. Mingled vanity and pride appear in this, that when miserable men do seek after God, instead of ascending higher than themselves, as they ought to do, they measure Him by their own carnal stupidity, and, neglecting solid inquiry, fly off to indulge their curiosity in vain speculation. Hence, they do not conceive of Him in the character in which He is manifested, but imagine Him to be whatever their own rashness has devised. This abyss standing open, they cannot move one footstep without rushing headlong to destruction. With such an idea of God, nothing which they may attempt to offer in the way of worship or obedience can have any value in His sight, because it is not Him they worship, but, instead of Him, the dream and figment of their own heart.
The expression of David (Ps. 14:1, 53:1), “The fool hath said in his heart, there is no God,” is primarily applied to those who stifle the light of nature, and intentionally stupefy themselves. We see many, after they have become hardened in a daring course of sin, madly banishing all remembrance of God, though spontaneously suggested to them from within, by natural sense. To show how detestable this madness is, the Psalmist introduces them as distinctly denying that there is a God, because although they do not disown His essence, they rob Him of His justice and providence, and represent Him as sitting idly in heaven. Nothing being less accordant with the nature of God than to cast off the crimes of men that they may wanton with impunity in evil courses; it follows, that every man who indulges in security, after extinguishing all fear of divine judgment, virtually denies that there is a God. As a just punishment of the wicked, after they have closed their own eyes, God makes their hearts dull and heavy, and hence, seeing, they see not. They rob Him of His glory by denying His power."