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?

I pictured myself as a virus or a cancer cell and tried to sense what it would be like.

I have had dreams and I have had nightmares, but I have conquered my nightmares because of my dreams.

As a child I was not interested in science. I was merely interested in things human, the human side of nature, if you like, and I continue to be interested in that. That's what motivates me.

Are we being good ancestors?

There is no such thing as failure, there's just giving up too soon.

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