Ps 53 is a different version of the same psalm found in Ps 14. . . . Both psalms belong to the general genre of prophetic speech. . . . The course of religious history is replete with fools who have said “There is no God” and with even greater fools who have said “Lord, Lord,” but who have refused to do the will of God (cf. Matt 7:21–23). The divine judgment for them is “I never knew you; depart from me, you evildoers.” This psalm (with its mate, Ps 14) affirms God’s lordship over human destiny and seeks to encourage faithfulness by the genuine people of God.

MARVIN TATE, PSALMS 51-100, VOLUME 20 (WORD BIBLICAL COMMENTARY), 40-43.