Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves.
Carl SaganHuman beings grew up in forests; we have a natural affinity for them. How lovely a tree is, straining toward the sky.
Carl SaganIf we long to believe that the stars rise and set for us, that we are the reason there is a Universe, does science do us a disservice in deflating our conceits?
Carl Sagan