Parables have been used in the Bible to explain difficult-to-grasp concepts to crowds of people around the world.
Somewhere in Japan, someone sat down and wrote the whole story complete with pictures about the philosophical foundation behind the open source movement.
Believe it or not, it uses an apple tree as an illustration and is called "Fairy tale of OpenSource". Written by Yutaka Kachi, it is composed of three chapters for now, although the author does not say whether he will stop there.
The introduction is quite simple to follow but chapters 2 and 3 add "complicated notice boards" and this is where things become more difficult to follow.
Anyway, if ever you wanted to learn more about Open Source but never managed to get your answers, head this way.