Bogumil Kielak
Bogumil Kielak voted up Tom Jackson's answer

This question deserves about a 5 page response, but I don't have the time.

But here's two quotes from an article, and a link to that article, that gives a decent answer to your question:

Why did God make the earth and us along with it? He doesn't really need us, so why did he create anything?

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Bogumil Kielak
Bogumil Kielak voted up Pepper pot's answer

Well you could look at it this way we are have a brain, a heart, and courage all things the scarecrow, Tin man and Lion didn't have, they were given a degree, a clock and a medal. Maybe we're meant to work it out, let's hope we are not in the land of Oz :)