Information is not knowledge and knowledge is not wisdom.

Intuition was not just visual but also auditory and kinesthetic. Those who watched Feynman in moments of intense concentration came away with a strong, even disturbing sense of the physicality of the process, as though his brain did not stop with the grey matter but extended through every muscle in his body.

The alternative to doubt is authority, against which science had fought for centuries.

As soon as the printing press started flooding Europe with books, people were complaining that there were too many books and that it was going to change philosophy and the course of human thought in ways that wouldnt necessarily be good.

Ideas that require people to reorganize their picture of the world provoke hostility.

He believed in the primacy of doubt, not as a blemish upon our ability to know, but as the essence of knowing.

The Internet is like a town that leaves its streets unmarked on the principle that people who don't already know don't belong