"It is not sufficient to know, one must apply."

"We must dare to know, and to speak what we know."

"The progress of science is like the ascent of a mountain, where every step brings new horizons into view."

"I have lived long enough to be certain that the world will not be ready for my discoveries until at least a hundred years after my death."

"The most important thing for a man of science is to have a clear head and a good heart."