For {b} strangers are risen up against me, and {c} oppressors seek after my soul: they have not set God before them. Selah.

(b) That is, the Ziphims.

(c) Saul and his army who were like cruel beasts, could not be satisfied except by his death.Psalm 54:3 Parallel Commentaries

Epistle ii. To Anastasius, Bishop of Antioch.
To Anastasius, Bishop of Antioch. Gregory to Anastasius, Patriarch of Antioch. I have received the letters of your most sweet Blessedness, which flowed with tears for words. For I saw in them a cloud flying aloft as clouds do; but, though it carried with it a darkness of sorrow, I could not easily discover at its commencement whence it came or whither it was going, since by reason of the darkness I speak of I did not fully understand its origin. Yet it becomes you, most holy ones, ever to recall …
Saint Gregory the Great—the Epistles of Saint Gregory the Great

Psalms
The piety of the Old Testament Church is reflected with more clearness and variety in the Psalter than in any other book of the Old Testament. It constitutes the response of the Church to the divine demands of prophecy, and, in a less degree, of law; or, rather, it expresses those emotions and aspirations of the universal heart which lie deeper than any formal demand. It is the speech of the soul face to face with God. Its words are as simple and unaffected as human words can be, for it is the genius …
John Edgar McFadyen—Introduction to the Old Testament