Thomas Aquinas, on Ps 33:12

“Come, children, hearken to me: I will teach you the fear of the Lord.”

“Then he adds his teaching when he says, "Who is the man?" And concerning this he does two things. First, he teaches the fruit of fear. Second, the teaching itself, at "Keep." He says therefore, "Who is the man who desires life?" For a person desires two things: namely a long life and prosperity. But because a long life in evil is to be fled, therefore he says, "Who is the man who desires life?" This life, moreover, a person acquires through the fear of the Lord, which is the beginning of wisdom, as is said in Ps. 110, without which wisdom there is no life; hence wisdom herself says, Prov. 8: "He who finds me shall find life." Some, however, live but in evils and hardships: Gen. 47: "The days of the pilgrimage of my life are one hundred and thirty years, few and evil." And therefore he says, "He loves to see good days," that is, full days, because in those days of eternity there is nothing but good: Ps. 83: "One day in your courts is better than a thousand."”

Imported from an open dataset — not yet checked against the printed edition.