We should be on our guard not to overestimate science and scientific methods when it is a question of human problems, and we should not assume that experts are the only ones who have the right to express themselves on questions affecting the organization of society.

As I look back over the truly crucial events in my life I realize that they were not planned long in advance. Albert Einstein said, 'There are only two ways to live your life. One is as though nothing is a miracle. The other is as though everything is.'

Anyone can repeat a technical explanation they read in a text-book or blog post.

If we knew what it was we were doing, it would not be called research, would it?

[Asked about a book in which 100 Nazi professors charged him with scientific error.] Were I wrong, one professor would have been quite enough.

Physical concepts are free creations of the human mind, and are not, however it may seem, uniquely determined by the external world.

Once you can accept the universe as matter expanding into nothing that is something, wearing stripes with plaid comes easy.