I have dreams, and I have nightmares. I overcame the nightmares because of my dreams. - Jonas Salk

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 this comes about as a matter of necessity — Almost as if there is something in us that is innate, something inherent in us, that is destined for a longer term, rather than a shorter term future.

Reply when questioned on the safety of the polio vaccine he developed:

It is safe, and you can't get safer than safe.

The idea of being constructive, creative, positive, in trying to bring out the best in one's own self and the best in others follows from what I've just been saying. Again, I repeat my belief in us, in ourselves, as the product of the process of evolution, and part of the process itself. I think of evolution as an error-making and error-correcting process, and we are constantly learning from experience. It's the need to dedicate one's self in that way, to one's own self, and to choose an activity or life that is of value not only to yourself but to others as well.