Augustine of Hippo

"The Lord questions the righteous and ungodly" [Psalm 11:5]. Why then do we fear lest the ungodly should be any hurt to us, if so be they do with insincere heart share the sacraments with us, seeing that He "questions the righteous and the ungodly." "But whoso loves iniquity, hates his own soul:" that is, not him who believes God, and puts not his hope in man, but only his own soul does the lover of iniquity hurt.

Exposition on Psalm 11 ↗

Jerome

The Lord questions the just and the impious: but he who loves iniquity hates his own soul. For which it is better written in the Hebrew: "The Lord tests the just, but the impious and the one who loves iniquity — his soul hates him." So that the sense is joined with the foregoing: In vain are the adversaries prepared, that they may shoot in the dark the upright of heart, and so on; because the Lord is a just judge, and nothing can be hidden from him, and he does both: that he both prove his just ones by tempting them, and hate those …

Homily 60, on Psalm 10 (Alternate Series) ↗

Thomas Aquinas

Here the condemnation is set forth, and concerning this he does two things: first he sets forth the guilt; second, the punishment, at "he shall rain upon sinners." He shows that as far as God's part is concerned, there is no perdition of the wicked, but it comes from our part; hence he says, "he who loves iniquity," that is, sin. 1 Jn. 3: "Everyone who commits sin commits iniquity also, because sin is iniquity." "He hates his own soul." Wis. …

Exposition on the Psalms of David ↗