Charles Ellicott Commentary Psalms 90:11

"Who knoweth the power of thine anger, And thy wrath according to the fear that is due unto thee?" — Psalms 90:11 (ASV)

Who knows ... —Better,

Who regards Your anger
And—in a measure due to reverence—Your wrath?

Who (no doubt with thought of Israel’s enemies) has that just terror of Your wrath which a truly reverential regard would produce? It is only the persons who have that fearful and bowed apprehension of His Majesty, and that sacred dread of all offense to Him, which is called the “fear of God.” And this is not inconsistent with a child-like trust and love, and a peaceful security ("Of whom, then, shall I be afraid?"). On the other hand, those who scoff at religion often become the victims of wild and base terror.