Life is an error-making and an error-correcting process, and nature in marking man's papers will grade him for wisdom as measured both by survival and by the quality of life of those who survive. - Jonas Salk. View more images...

The reward for work well done is the opportunity to do more. - Jonas Salk. View more images...

I have had dreams, and I have had nightmares. I overcame the nightmares because of my dreams. - Jonas Salk. View more images...