"The future of humanity depends on our ability to understand and harness the power of science."

"My original decision to devote myself to science was a direct result of the discovery, which has never ceased to fill me with enthusiasm, that the laws of nature are accessible to human thought."

"The history of science shows that even the most firmly established theories can be overturned by new discoveries."

"The human mind is the most complex and mysterious thing in the universe."

"No burden is so heavy for a man to bear as a succession of happy days."