supposedly, we were put on this planet because god wanted people to worship him, and since he didn't want to put that in everyone's mind to begin with, he gave us free will, to choose to worship him. what a gentlemen!
it makes you think about the reason there is no life found in the universe. maybe god destroyed all the other life-inhibiting planets because they chose wrong, and those who chose correct lived in heaven with him? thinking about god, and whether or not his existence is real, is also a very deep subject...