1:6 he . . . will bring it to completion. The perseverance of the saints depends upon God’s preserving them by grace. See “Perseverance of the Saints” at Rom. 8:30. God’s saving purpose will be fulfilled on “the day of Christ” (v. 10; 2:16), when He returns in glory to raise His people from the dead (3:11, 20, 21) and to receive universal homage (2:9–11).