"The value of a discovery consists not in its novelty, but in its truth."

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

"The chemist, like the artist, must have a vivid imagination, but it must be controlled by reason."

"We may lay it down as an incontestible axiom, that, in all the operations of art and nature, nothing is created; an equal quantity of matter exists both before and after the experiment; the quality an…"

"I shall be happy if my work contributes to the progress of the sciences, and to the well-being of mankind."