Philippians 1:6

Being confident. See on Hebrews 3:6.

He which hath begun. That is, God. The apostle wants his converts to remember that God is the author of their salvation (cf. Philippians 2:13; Hebrews 12:2; 13:20, 21).

A good work. That is, the work of salvation.

Perform. Gr. epiteled, “to bring to an end,” “to perfect.” The Lord is a perfect workman. He completes every work to which He sets His hand, if only the human material permits Him to do so. Furthermore, the product of such workmanship will be perfect. And He does not weary in well-doing. He has brought the Philippians into the fellowship of the gospel, but that is a work which is not finished with a single act. It is completed gradually, but none the less surely. Confidence in God’s constant interest and guidance is a keynote of Paul’s writings. He wishes to impart that same certainty to the Philippians.

Day of Jesus Christ. Synonymous with the expression “day of the Lord” (see on Acts 2:20; cf. Philippians 1:10; 2:16). The work of perfecting will continue until Christ comes to receive His own. Nothing short of a continuous, spiritual growth can prepare one to welcome Christ when He comes the second time.