"After all, science is essentially an international thing."

"I never had a moment of doubt that science was the right path for me."

"First principle: never to let one's self be beaten down by persons or by events."

"The older one gets, the more one feels that the only thing that matters is to do one's duty."

"You cannot hope to build a better world without improving the individuals. To that end, each of us must work for his own improvement, and at the same time share a general responsibility for all humani…"