Albert Barnes Commentary Psalms 53:4

"Have the workers of iniquity no knowledge, Who eat up my people [as] they eat bread, And call not upon God?" — Psalms 53:4 (ASV)

Have the workers of iniquity no knowledge? - See the notes at Psalm 14:4. The only change in this verse is in the omission of the word "all." This word, as it occurs in Psalm 14:1-7 (all the workers of iniquity), makes the sentence stronger and more emphatic. It is designed to affirm in the most absolute and unqualified manner that none of these workers of iniquity had any true knowledge of God. This has been noticed by critics as the only instance in which the expression in Psalm 14:1-7 is stronger than in the revised form of the psalm before us.