Let us continue to “consider Jesus.” (Heb. 3:1)
Heb 12:2“fixing our eyes on Jesus, the author and perfecter [finisher – KJV, NKJV] of faith, who for the joy set before Him endured the cross, despising the shame, and has sat down at the right hand of the throne of God.”
Jesus is the beginning, middle and end of our salvation. Sometimes that is explicitly stated, as in this verse and the in the Alpha and Omega passages (Rev. 1:8, 21:6; 22:13) He is fully the “Alpha and the Omega, the first and the last, the beginning and the end.” (Rev. 22:13)
The first description of Him here is that He is the “author,” the starting or originator or our faith. Then he also brings it to completion, to perfection, to its fullness. So He is the creator and sustainer of it until the very end.
The beginning and ending of the faith is true for us in two parts. First, that the work He planned and set out to do, He did. He came to earth, loved us, taught His way, was successfully the sacrifice for our sins, and set the church in motion. But then, in a second, in a personal way for each of us, He helps us to reach the end and object of our faith by sustain us in our faith through His teaching and help for us in being a Christian until the ultimate day. “For I am confident of this very thing, that He who began a good work in you will perfect it until the day of Christ Jesus.” (Phil. 1:6)