Mark Twain's Roughing It is a book that many people don't know about, but I highly recommend to anybody at any age.
“I have always felt the basis of everything in life is sexual, and I will maintain that to my dying day.”
“A rude nature is worse than a brute nature by so much more as man is better than a beast: and those that are of civil natures and genteel dispositions are as much nearer to celestial creatures as those that are rude and cruel are to devils.”