[Who owns the patent on this vaccine?] Well, the people, I would say. There is no patent. Could you patent the sun?

I feel that the greatest reward for doing is the opportunity to do more.

My life is pretty well at peace, and the profession is more of an avocation. It's a calling, if you like, rather than a job. I do what I feel impelled to do, as an artist would.

What people think of as the moment of discovery is really the discovery of the question.

I have the impression that the new generation of young people, are coming up on the scene with a sense "ancestorhood", and with more wisdom than was evident before.

I think of the need for more wisdom in the world, to deal with the knowledge that we have. At one time we had wisdom, but little knowledge. Now we have a great deal of knowledge, but do we have enough wisdom to deal with that knowledge?

Risks, I like to say, always pay off. You learn what to do, or what not to do.