"everyone has the capacity to redeem themselves" - to what extent is this shown in a Christmas carol

The greatest pleasure in A Christmas Carol is watching Scrooge's transformation from money-pinching grouch to generous gentleman. His redemption, a major motif in Christian art, is made possible through free will. While Scrooge is shown visions of the future, he states (and his statement is borne out in Stave Five) that they are only visions of things that "May" be, not what "Will" be. He has the power to change the future with his present actions, and Dickens tries to impart this sense of free will to the reader; if Scrooge can change, then so can anyone.