La prueba de ausencia no es prueba de ausencia - Carl Sagan

"Somewhere, something incredible is waiting to be known."

"There are no forbidden questions in science, no matters too sensitive or delicate to be probed, no sacred truths."

"The idea that God is an oversized white male with a flowing beard, who sits in the sky and tallies the fall of every sparrow is ludicrous. But if by 'God,' one means the set of physical laws that govern the universe, then clearly there is such a God. This God is emotionally unsatisfying... it does not make much sense to pray to the law of gravity."

"One glance at a book and you hear the voice of another person, perhaps someone dead for 1,000 years. To read is to voyage through time."

"I don't want to believe. I want to know."