Albert Barnes Commentary Revelation 21:7

"He that overcometh shall inherit these things; and I will be his God, and he shall be my son." — Revelation 21:7 (ASV)

He that overcometh. See Barnes on Revelation 2:7.

Shall inherit all things. Be an heir of God in all things. See Barnes on Romans 8:17.

Compare Revelation 2:7, 2:11, 2:17, 2:26; 3:5, 3:12, 3:21.

And I will be his God. That is, for ever. He would be to them all that is properly implied in the name of God; he would bestow upon them all the blessings which it was appropriate for God to bestow. See Barnes on 2 Corinthians 6:18; Hebrews 8:10.

And he shall be my son. He shall sustain to me the relation of a son and shall be treated as such. He would ever onward sustain this relation and be honoured as a child of God.