Words can be meaningless. If they are used in such a way that no sharp conclusions can be drawn.
When playing Russian roulette the fact that the first shot got off safely is little comfort for the next.
What is not surrounded by uncertainty cannot be the truth.
What I cannot create, I do not understand.
We scientists are used to this, and we take it for granted that it is perfectly consistent to be unsure, that it is possible to live and not know. But I don’t know whether everyone realizes this is true.
There is no learning without having to pose a question. And a question requires doubt.
There is no harm in doubt and skepticism, for it is through these that new discoveries are made.
The worthwhile problems are the ones you can really solve or help solve, the ones you can really contribute something to.
The thing that doesn’t fit is the thing that is most interesting.
The test of all knowledge is experiment. Experiment is the sole judge of scientific “truth.”
The real problem in speech is not precise language. The problem is clear language.
The inside of a computer is as dumb as hell but it goes like mad!
