What the Lord starts, the Lord finishes. That applies to His work conforming us into the image of His Son, and ultimately presenting us to Himself without spot or blemish in heaven. And His work is not stopped because of our many times of sinning, rebelling, and drifting from Him. He has said "All things work together for our good" and that includes our many failures. Yes, what God starts God finishes and that includes His work in us despite us (Philippians 1:6).