Jesus, the author and finisher of our faith. 

I am the Alpha and the Omega, the Beginning and the End,” says the Lord, “who is and who was and who is to come, the Almighty.” § Who has performed and done it, calling the generations from the beginning? “I, the Lord, am the first; and with the last I am He.”Sanctified by God the Father, and preserved in Jesus Christ.The God of peace Himself sanctify you completely; and may your whole spirit, soul, and body be preserved blameless at the coming of our Lord Jesus Christ. He who calls you is faithful, who also will do it. § He who has begun a good work in you will complete it until the day of Jesus Christ. § Are you so foolish? Having begun in the Spirit, are you now being made perfect by the flesh?§ The Lord will perfect that which concerns me.It is God who works in you both to will and to do for His good pleasure.