Albert Barnes Commentary Psalms 94:12

"Blessed is the man whom thou chastenest, O Jehovah, And teachest out of thy law;" — Psalms 94:12 (ASV)

Blessed is the man whom thou chastenest, O Lord — "Happy the man;" or "Oh the blessedness of the man." See the notes at (Psalms 1:1).

The word here rendered "chastenest" does not mean to chasten in the sense of afflicting or punishing. It means here to instruct; to warn; to admonish; to exhort. So the word is employed in (Proverbs 9:7); (Job 4:3); (Psalms 16:7).

The meaning here is, that the man is blessed or happy whom God so "instructs, warns, or teaches," that he understands the principles of the divine administration. Such a man will see reasons for confidence in him in trouble, and for calmness of mind until punishment is brought upon his enemies.

And teachest him out of thy law — Causes him, from your word, to understand the great principles of your government.