Scott

“So my antagonist said, "Is it impossible that there are flying saucers? Can you prove that it's impossible?" "No", I said, "I can't prove it's impossible. It's just very unlikely". At that he said, "You are very unscientific. If you can't prove it impossible then how can you say that it's unlikely?" But that is the way that is scientific. It is scientific only to say what is more likely and what less likely, and not to be proving all the time the possible and impossible.”
― Richard P. Feynman

“Fear is the main source of superstition, and one of the main sources of cruelty. To conquer fear is the beginning of wisdom.”
― Bertrand Russell, Unpopular Essays

“Not to be absolutely certain is, I think, one of the essential things in rationality.”
― Bertrand Russell, Am I an Atheist or an Agnostic?

“My view is that if your philosophy is not unsettled daily then you are blind to all the universe has to offer.”
― Neil deGrasse Tyson