"I consider it an extremely dangerous doctrine, because the more likely we are to assume that the solution comes from the outside, the less likely we are to solve our problems ourselves."
"The nuclear arms race is like two sworn enemies standing waist deep in gasoline, one with three matches, the other with five."
"I don't want to believe. I want to know."
"La prueba de ausencia no es prueba de ausencia"
"A celibate clergy is an especially good idea, because it tends to suppress any hereditary propensity toward fanaticism."
"Extraordinary claims require extraordinary evidence."