My attitude was always to keep open, to keep scanning. I think that's how things work in nature. Many people are close-minded, rigid, and that's not … - Jonas Salk

I judge things from an evolutionary perspective — "How does this serve and contribute to the process of our own evolution?" — rather than think of good and evil in moral terms. I see the triumph of good over evil as a manifestation of the error-correcting process of evolution.

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

You have to develop a thick skin in life. Its not in this field only. You might think of the ideal of the scientists, the ivory tower, the idealist. That's true of some. And I wouldn't guess as to what proportion. But there are some who are of that character, and there are some who are not.