Here is the role of the Atoning Messiah. Christ comes for the sinner, to open the way of restoration to good. The imagery here is being pulled from “that endless night of darkness.” This image returns to the light/dark imagery we have seen earlier in Alma’s discourse. In the earlier imagery darkness existed as at a distance away from the light (outer darkness as a far distance from light). The directional movement of the soul toward outer darkness is reversed by the Savior who “delivers” man out of the darkness and back to the light. In the conception of direction of movement, man is “restored” to light after his departure from it.
After the Savior brings them back into light, man is again able to act for Good, and therefore to create the quality that will be restored to him in the next life (according to his works and his heart).