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.