1:6 will perform it. It is neither our responsibility nor within our capability to maintain ourselves in a state of salvation. God began this work in us (Ephesians 2:8), and He will assure its continuance.
1:6 day of Jesus Christ. The “day of Jesus Christ” (I Corinthians 1:8; 5:5; II Corinthians 1:14; Philippians 1:10; 2:16; II Thessalonians 2:2) is the day when Christ returns for His people (John 14:2-3).