"The future of chemistry depends on the precision of its instruments and the accuracy of its observations."

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

"I consider nature a vast chemical laboratory, in which all sorts of combinations and decompositions are continually taking place."

"We must trust to nothing but facts, for we are to have no other guide."

"I have never been able to believe in anything that I could not demonstrate by experiment."