He is: The Alpha and Omega Revelations 1:8
"I am the Alpha and the Omega," says the Lord God, "who is, and who was, and who is to come, the Almighty."
He is the beginning and the end. When God called himself the Alpha and Omega, it meant that he will finish what he started. That also applies to the plans he has for us.
He started the work in us (past) he is still at work in us (present) and will finish what he started (future).
I know that I need to follow his example and finish things that I start. (such as this 30 day discovery)