Context / explanationDr. Eleanor Arroway (played by Jodie Foster) in the movie "Contact" which is based on the book with the same name.
Source1997:
Contact, ISBN
9780671004101, Publisher Simon and Schuster, reprint / reissue, first published in 1985, Autor: Carl Sagan, Evidence
1997:
Contact, at the end to a group of children, theme appears multiple times in the movie, Source
2012:
www.youtube.com/watch?v=HQBp-59Nyws, 1:40, Source
Similar quotesTwo possibilities exist: Either we are alone in the Universe or we are not. Both are equally terrifying.
Arthur C. Clarke 
Once you can accept the universe as matter expanding into nothing that is something, wearing stripes with plaid comes easy.
Albert Einstein 
Space is big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space.
Douglas Adams 
Only two things are infinite, the universe and human stupidity and I'm not sure about the former.
Albert Einstein 
The universe is not required to be in perfect harmony with human ambition.
Carl Sagan 