Charles Ellicott 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 who overcomes will inherit all things...—Rather, He who conquers will inherit these things; and I will be his God, and he will be my son. The general promise of Revelation 21:3 is in part repeated, and this time more individually.

Again we catch, as it were, the echo of the promises to the Seven Churches; the blessing is for him who conquers. The idea of the war and the conquest is a favourite one with St. John (John 16:33; 1 John 2:13–14; 1 John 5:4–5; see also Note on Revelation 2:7). The source and weapon of victory have been previously stated: the blood of the Lamb, the word of their testimony (Revelation 12:11), and the victory of faith (1 John 5:4).