Mere Christianity by C S Lewis
I may not be a Christian, and I may not believe in the Christian concept of God in which Lewis believed, but I do believe in the idea that we are a physical manifestation of the Creative Energy which underlies the whole universe and beyond; and that Lewis's description of the process of becoming a true expression of that Power is, for me, simple, accessible, comprehensible, and beautiful.
God, it seems, has greater plans for me than I do for myself, and I'm okay with that because I don't have the imagination to think big - but I don't need to, because He'll do it for me. Plus, as I've often discussed, I am hopeless with plans, so if it were left up to me to do the planning for my life I'd still be a broken-down shack. I just have to get on board with following along, and doing the little things each day which keep me by Her/His side, invite Him into my 'home', and make Her feel welcome enough to want to stay.