"And yet and yet - the last secret of the tree of codes is that nothing can ever reach a definite conclusion. Nowhere as much as there do we feel possibilities shaken by the nearness of realization. The atmosphere becomes possibilities and we shall wander and make a thousand mistakes. We shall wander along yet not be able to understand."

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In his eyes shone the reflection of the most beautiful planet in the Universe---a planet that is not too hot and not too cold; that has liquid water on the surface and where the gravity is just right for human beings and the atmosphere is perfect for them to breathe; where there are mountains and deserts and oceans and islands and forests and trees and birds and plants and animals and insects and people---lots and lots of people. Where there is life. Some of it, possibly, intelligent.

— Stephen Hawking