The fool says in his heart,
“There is no God."
Here the psalmist shows what is the root of all ungodliness. It is the "foolishness" of thinking that God does not exist. The agnostic is undecided. He has doubts about the question of God. What is called practical atheism is not an opinion but a way of life. This attitude may coexist with a weak belief in the being of God, but the person lives as if there were no God. The statement made here goes further. Here we find the complete rejection of Christian theism. Now when atheists argue that they are absolutely certain that there is no god, they implicitly claim to know all things. This is nonsense. For the atheist to claim that there is no God, and that there are no traces of God's existence anywhere, the atheist must have explored all the infinite regions scattered throughout the universe. This requires omnipresence, or in other words, it would imply that the atheist is God himself. Atheism is irrational. It’s not a system that satisfies the intellect. You can never be sure that there is no God. It assumes a kind of knowledge that the human mind simply does not have. David is right! Only a fool would be satisfied with the claim that there is no God.