"As ideas are preserved and communicated by means of words, it necessarily follows that we cannot improve the language of any science, without at the same time improving the science itself; neither can…"

"The human mind, like the human body, requires nourishment."

"The art of concluding from experience and observation consists in evaluating probabilities."

"The success of charlatans, sorcerors, and alchemists—and all those who abuse public credulity—is founded on errors in this type of calculation."

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