New Defender's Study Bible Notes
8:17 joint-heirs. The Son has been given all the nations and the uttermost parts of the earth for “thine inheritance” (Psalm 2:8). He created all things and is “appointed heir of all things” (Hebrews 1:2). This is something of what it means for us to be adopted children and thus to share His inheritance! Note also Ephesians 1:11,14; I Peter 1:4; etc.