How do we know that a good work in us will be completed?

The assurance that God will complete the good work in us is founded in His unchanging nature. Philippians 1:6 provides a powerful promise that He who began this work will carry it on to completion until the day of Christ Jesus. This reflects God's commitment to His covenant with His people and His ability to fulfill His promises. It affirms that our spiritual growth and perseverance are sustained by His grace and power, not by our own efforts. Consequently, Christians can rest assured that their salvation is secure and will end in glory.