Psalm 14 The Fool (a morally deficient term) says in his heart There is no God. Atheism is an irrational denial of that which we know to be true. Truly, there is a God:

Truly there is a God, although the fool hath said in his heart, There is no God. AND so, Lord, do thou, who dost give understanding to faith, give me, so far as thou knowest it to be profitable, to understand that thou art as we believe; and that thou art that which we believe. And indeed, we believe that thou art a being than which nothing greater can be conceived. Or is there no such nature, since the fool hath said in his heart, there is no God?

St. Anselm of Cantebury

Indeed, Romans 1:18-20 tell us that all people truly, in some way, know there is a God, even amidst a denial or suppression of that truth. To deny what one knows - is in fact the work of fools. The attending result in verse 1 is that they are corrupt, they do abominable deeds, there is none who does good. God looks down on humanity to see if any understands and seeks God - and as Romans 3 echos, there is none who does good, not even one. Human beings in turn will do great evil to one another, and will not call upon the Lord who could help then. But God is with the generation of the righteous - those who are his people - he is to bring salvation and restitution, and this brings great terror and certain to the minds of those who flee from God. This salvation will come out of Zion - when God restores the fortunes of his people - this, is a reason for rejoicing and gladness for the people of God.

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