“Knowledge without love is worse than ignorance. Action without love is madness...”

“Do question, even the basics!You will be a fool for once!If you don't, you will be, for a lifetime..”

“Time, as it grows old, teaches all things.”

“I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettie...”

“To know the history of science is to recognize the mortality of any claim to universal truth. ”

“The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists.”