Albert Barnes Commentary Psalms 33:8

"Let all the earth fear Jehovah: Let all the inhabitants of the world stand in awe of him." — Psalms 33:8 (ASV)

Let all the earth – All the inhabitants of the earth.

Fear the Lord – Worship and adore a Being of so great power. See the notes at (Psalms 5:7).

Let all the inhabitants of the world – The power displayed in the works of creation appeals to all alike.

Stand in awe of him – Reverence or adore him. The expression is equivalent to “worship,” fear or reverence entering essentially into the idea of worship.