I've read a lot of C.S. Lewis in my day. In fact, chances are good that I'm reading a C.S. Lewis book right now, regardless of when you happen to come across this post (as I write, I'm just beginning to reread The Magician's Nephew)--chances are, I'm rereading a C.S. Lewis book. They're just that good.
Of all his books, THE WEIGHT OF GLORY remains one of my favorites, particularly the title essay "The Weight of Glory." I actually found a version of this essay online: here is the link. Some of my most remembered quotes come from that essay.
A collection of Lewis's sermons and lectures and essays, the book itself is slim, easy to pick up and put down, and to reread when you feel in need of a little Lewis recharge. That is what I needed this time through though, honestly, I didn't finish it this second time because my copy of Culver's Systematic Theology showed up in the mail while I was right in the middle--THE WEIGHT OF GLORY was put down and never resumed, since Culver is quite a commitment and I'm sure he'll keep me busy for months (if you've not seen it, Systematic Theology is enormous--roughly the size of a small coffee table).
So, I got distracted, from both the book and my point. To sum things up, I love this book. Also, don't skip the introduction--there are some wonderful anecdotes about C.S. Lewis in there. Absolutely charming.