So I have just one wish for you – the good luck to be somewhere where you are free to maintain the kind of integrity I have described, and where you do not feel forced by a need to maintain your position in the organization, or financial support, or so on, to lose your integrity. May you have that freedom.

A philosopher once said, 'It is necessary for the very existence of science that the same conditions always produce the same results.' Well, they don't!

If a guy tells me the probability of failure is 1 in 100,000, I know he's full of crap.

It is not unscientific to make a guess, although many people who are not in science think it is.

To those who do not know mathematics it is difficult to get across a real feeling as to the beauty, the deepest beauty, of nature ... If you want to learn about nature, to appreciate nature, it is necessary to understand the language that she speaks in.

But there is nothing in biology yet found that indicates the inevitability of death.

A great deal more is known than has been proved.