Don't pay attention to "authorities," think for yourself.

But see that the imagination of nature is far, far greater than the imagination of man.

Turbulence is the most important unsolved problem of classical physics.

I don't feel frightened by not knowing things.

Scientific knowledge is an enabling power to do either good or bad — but it does not carry instructions on how to use it.

I learned a lot of different things from different schools. MIT is a very good place…. It has developed for itself a spirit, so that every member of the whole place thinks that it’s the most wonderful place in the world—it’s the center, somehow, of scientific and technological development in the United States, if not the world … and while you don’t get a good sense of proportion there, you do get an excellent sense of being with it and in it, and having motivation and desire to keep on

Science is what we do to keep us from lying to ourselves