If you thought that science was certain - well, that is just an error on your part.

I find that teaching and the students keep life going, and I would never accept any position in which somebody has invented a happy situation for me where I don't have to teach. Never.

From a long view of the history of mankind the most significant event of the nineteenth century will be judged as Maxwell's discovery of the laws of electrodynamics.

The exception tests the rule.

When you get as old as I am, you start to realize that you've told most of the good stuff you know to other people anyway.

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

There is nothing that living things do that cannot be understood from the point of view that they are made of atoms acting according to the laws of physics.