"Nothing is created, either in the operations of art, or in those of nature; and it may be considered as a general principle that in every operation there exists an equal quantity of matter before and …"

"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 greatest pleasure of the human mind is to discover the truth."

"It took them only an instant to cut off that head, but France may not produce another like it in a century."

"The true philosopher is he who knows how to doubt."