How do we know that God will complete the work He began in us?

Philippians 1:6 assures us that 'he which hath begun a good work in you will perform it until the day of Jesus Christ.' This promise emphasizes the faithfulness of God in the work of salvation and sanctification in the life of a believer. When God begins a work in our hearts, it is an expression of His grace, and His commitment doesn’t cease until that work is fully completed at the return of Christ. This assurance is crucial for Christians, especially during trials and challenges, as it reminds us that we are not dependent on our own efforts, but rather on God's sustaining grace throughout our spiritual journey.