Psalms 71:21

Thou shalt increase my greatness - Thou wilt not merely restore me to my former condition, but wilt enlarge my happiness, and wilt do still greater things for me.

And comfort me on every side - literally, “Thou wilt turn thyself; thou wilt comfort me.” The word also means to surround; to encompass Genesis 2:11, Gen 2:13; 1 Kings 7:24; Psalms 18:5; and the idea here may be that God would “go around him,” or encircle him, and would thus comfort him. This idea is expressed in our common version. It was the confident assurance of entire, or complete consolation.