well. arach and i have been discussing this for some time. it seems to me a good explaination..
god created us because he was lonely and there was nothing like him in the universe. but he doesn't want us until we have matured into gods where we can be on his level. no one wants an unequal lover..
god has two main aspects in the old testament: he knows everything and he's eternal. these two aspects are summed into the two trees. it seems god wants us to be like him. we are made in his image. in order to become gods ourselves, we must achieve the two aspects. he gave us our option. we picked knowledge. this is a useful, but dangerous tool. we have to learn to use it wisely and we will be able to attain life on our own.
if you live long enough, you will learn everything. if you know everything, you will learn how to life forever. so either way we will become gods (if merely as a race) and give him company.