C.S. Lewis' "Mere Christianity"

It's been a long time since a book other than the Bible has got me good and excited. I started reading this book just before camp, but I forgot about until today. I'm feeling quite below the weather, so there's little else to do right now except read. I would like to convince you to read this book. It is good. C.S. Lewis was a genious. His reasoning is unusual, and exciting. Here's what he says to people who say that a perfect God could not have created a people capable of sinning, and therefore a perfect God cannot exist:
"Some people think they can imagine a creature which was free but had no possibility of going wrong; I can not. If a thing is free to be good it is also free to be bad. And free will is what has made eveil possible. Why, then, did God give them free will? Because free will, though it makes evil possible, is also the only thing that makes possible any love or goodness or joy worth having. The happiness which God designs for His higher creatures is the happiness of being freely, coluntarily united to Him and to each other in an ecstasy of love and delight compared with which the most rapturous love between a man and a woman on this earth is mere milk and water. And for that they must be free."
Another section explaining why history is riddled with pain and brokeness: "The reason why it can never succeed is this. God made us; invented us as a man invents an engine. A car is made to run on petrol, and it would not run properly on anything else. Now God designed the human machine to run on Himself. He Himself is the fuel our spirits were designed to burn, or the food our spirits were designed to feed on. There is no other. God cannot give us a happiness and peace apart from Himself, because it is not there. There is no such thing."

This hit me pretty hard. As a Christian I should know this. I know that Jesus is the Bread, the Life, etc., and yet I am still forever trying to feed the engine with the wrong fuel. It's not that I intentionally seek fulfillment in other places, but the times when I don't fuel myself with God, I find myself drawn more towards the things that just won't cut it: music, solitude, sports, the search for Miss Right, all things that in and of themselves are great, but useless in trying to run an engine that is designed to run on God.