“It is sometimes said that we should never believe a scientific theory until it is verified by experiment. But a famous astronomer has also stated that we should never believe an observation until it is confirmed by a theory.”
“I don't believe your theory that "readers never notice that sort of thing." I'm sure I should.”
“I don't believe anything till I have seen the proof. For anything without proof, I think we should believe the theory that gives us peace. It doesn't matter whether the theory is true or not.”
“We must never assume that local practice conforms with state theory.”
“Generally the theories we believe we call facts,and the facts we disbelieve we call theories.”
“Always there whom we believe shouldn't be and never are there whom we believe should be.”