Clement of Rome

Let your children take part in the instruction that is in Christ, let them learn how powerful with God is humility, how strong is a pure love, how the fear of him is beautiful and great and saves those who live in it in holiness with a pure mind. For he is a searcher of thoughts and desires; his breath is in us, and when he wills, he will take it away.

1 Clement 21 ↗

Augustine of Hippo

"For my life has failed in pain" [Psalm 31:10]. For my life is to confess You, but it failed in pain, when the enemy had said, Let them be tortured until they deny Him. "And my years in groanings." The time that I pass in this world is not taken away from me by death, but abides, and is spent in groanings. "My strength has been weakened by want." I want the health of this body, and racking pains come on me: I want the dissolution of the body, and death forbears to come: and in this want my confidence has been weakened. …

Exposition on Psalm 31 ↗

Thomas Aquinas

Then when he says, "Because," and so on, he explains the tribulation as to external matters. For tribulation drives out the goods of the present life, which are three: namely, pleasures of the flesh, riches, and honors: 1 Jn. 2: "All that is in the world," and so on. Against the first he sets forth sorrow; against the second, poverty; and against the third, reproaches. The second is at "My strength is weakened"; the third at "Above all my enemies." Concerning the first he does two things. …

Exposition on the Psalms of David ↗