Evidence of Man's Deepest Corruption

Doug Moo on the implications of Rom. 1:22:

In that this "becoming foolish" involves the various idolatrous religions that people invent for themselves (v. 23), Paul's estimation of non-Christian religions also becomes clear in this verse. Far from being a preparatory stage in the human quest for God, these religions represent a descent from the truth and are "evidence of man's deepest corruption" [quoting Nygren].

 —The Epistle to the Romans (Eerdmans: Grand Rapids, 1988), p. 108.