And I think that view is more helpful than just calling it "akrasia", because it presents the situation as two aspects of your personality which happen to want different things, instead of some "weakness" which is interfering with your "true will".

Nice point.

BTW, the Silver Chair contains the defense of Christianity that I've probably heard Christians cite more than any other single source: "Suppose we have only dreamed, or made up, all of those things—trees and grass and sun and moon and stars and Aslan himself. Suppose we have. Then all I can say is that, in that case, the made-up things seem a good deal more important than the real ones."