"The age of ignorance is past. The age of reason is here. And it will be a glorious age, if we but choose to make it so."

"The principle of science, the definition, almost, is the following: The test of all knowledge is experiment. Experiment is the sole judge of scientific truth."

"I was always interested in things that are on the edge of what we know."

"I don't believe in the idea of a 'genius.' I believe in the idea of a 'hard worker.'"

"I can live with doubt and uncertainty and not knowing. I think it's much more interesting to live not knowing than to have answers which might be wrong."