"In Psalm 14:1 we are told, “The fool has said in his heart, There is no God! They acted corruptly; they have done abominable works, there is none who does good.”
Here we see that the Bible connects corrupt thoughts about God—especially denying His very existence—with corrupt morals.
And it is true that if there is no God, no Creator who sets the rules, then we are set adrift morally.
Underpinning this abandonment of faith in God is the widespread acceptance of evolutionary thinking—that everything made itself by natural processes; that God is not necessary."
CMI