“Two possibilities exist: either we are alone in the Universe or we are not. Both are equally terrifying.”

“I'm sure the universe is full of intelligent life. It's just been too intelligent to come here.”

“A faith that cannot survive collision with the truth is not worth many regrets.”

“But please remember: this is only a work of fiction. The truth, as always, will be far stranger.”

“Before you become too entranced with gorgeous gadgets and mesmerizing video displays, let me remind you that information is not knowledge, knowledge is not wisdom, and wisdom is not foresight. Each...”

“...a well-stocked mind is safe from boredom.”

“No persons are more frequently wrong, than those who will not admit they are wrong.”

“They say the distance between insanity and genius is measured only by success, I believe you can say the same thing about the distance between good and evil.”

“A cynic always focuses on problems and not on possibilities.”

“I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettie...”

“To know the history of science is to recognize the mortality of any claim to universal truth. ”

“The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists.”