The Popular Commentary by Paul E. Kretzmann - Psalms 53:1-6
Of the Corruption and Salvation of Men. To the chief musician, for use in the liturgical part of public worship, upon Mahalath, in a sorrowful manner, agreeing with the general tone of the hymn, Maschil, a didactic poem, a psalm of David. This psalm, under the direction of the Holy Spirit, was evidently recast from Psalms 14, probably for a special occasion, and was for that reason included in the Psalter for the second time. Cf Psalms 14 for the general explanation. v. 1. The fool hath said... read more
George Haydock's Catholic Bible Commentary - Psalms 53:6
Behold. He admires how God delivered him, though Saul seemed to have only one step more to take. Jesus Christ was secure amid the persecutions of the Jews, till he was pleased to deliver himself up, John x. 18. (Calmet) read more