"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…"

"Nothing is lost, nothing is created, everything is transformed."

"It is not enough to collect facts; we must connect them."

"The art of drawing conclusions from experiments and observations consists in evaluating probabilities and in judging if they are great enough to constitute proofs."

"It is only by means of experiments that we can arrive at the truth."