Augustine of Hippo

"Save me, O Lord, for the holy has failed;" that is, is not found: as we speak when we say, Corn fails, or, Money fails. "For the truths have been minished from among the sons of men" [Psalm 12:1]. The truth is one, whereby holy souls are enlightened: but forasmuch as there are many souls, there may be said in them to be many truths: as in mirrors there are seen many reflections from one face.

Exposition on Psalm 12 ↗

Thomas Aquinas

In the preceding decade the Psalmist treated of the persecution that he himself suffered from his son Absalom, through which was prefigured the persecution that Christ would suffer from Judas. In this second decade, however, as appears from the titles of certain Psalms, he treats of the persecution he suffered from Saul, through which was prefigured the persecution that Christ would suffer from the chief priests. This decade is divided into two parts. In the first he asks to be delivered from enemies. …

Exposition on the Psalms of David ↗