Christ is not offered us merely as a Savior who does something for us, but he is offered us as Someone who, having done something for us, is himself the propitiation [Romans 3:25]. . . .
It is not as if Christ handed you something and said, ‘Here is your redemption, here is your forgiveness,’ and then ran away, as a messenger hands a gift in at the door and the door shuts and away goes the messenger; he has done his job. Not a bit of it! It is Christ himself, the Worker, who comes to us himself. It is Christ personally who is our salvation. . . . It is Christ himself, personally, who comes to us with all the efficacy, the fruit of what he has done, and is the propitiation for our sin.
William Still, The World Of Grace, page 96.