Linus Torvalds. Just for Fun: The Story of an Accidental Revolutionary (№ 419928)

There are only three things that matter in life. They move both you and any living creature: the first is survival, the second is social order, and the third is pleasure. Everything in life goes through these three stages. And after the pleasure there is already nothing, Hence the conclusion: the meaning of life is to reach the third stage. Reached it - and it's in the bag. But first - go through the previous two ... The most obvious example is sex. Initially, it served to survive, then it became part of the social order: hence the marriage. And then it goes into the category of entertainment.