When I worked on the polio vaccine, I had a theory. I guided each [experiment] by imagining myself in the phenomenon in which I was interested. The intuitive realm . . . the realm of the imagination guides my thinking.

My ambition was to bring to bear on medicine a chemical approach. I did that by chemical manipulation of viruses and chemical ways of thinking in biomedical research.

The art of science is as important as so-called technical science. You need both. It's this combination that must be recognized and acknowledged and valued.

Good parents give their children Roots and Wings. Roots to know where home is, wings to fly away and exercise what's been taught them.

Find the right questions. You don't invent the answers, you reveal the answers.

What is ... important is that we - number one: Learn to live with each other. Number two: try to bring out the best in each other.

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.