What does the Bible say about God's good work in us?

In Philippians 1:6, Paul confidently states that He who began a good work in you will carry it on to completion until the day of Christ Jesus. This affirms the belief that salvation is not merely a one-time event but an ongoing process that is entirely God's work, from beginning to end. The assurance we have is rooted in God's sovereignty and faithfulness, which reflect His character and promises throughout Scripture. Those whom God has chosen will experience His transformative grace, evidencing faith that grows and matures over time.