Putting your hand into a river, you simultaneously touch the last of what is passing and the first of what is coming.

Many will think they may reasonably blame me by alleging that my proofs are opposed to the authority of certain men held in the highest reverence by their inexperienced judgments; not considering that my works are the issue of pure and simple experience.

Nothing will be left, Nothing in the air, nothing under the earth, nothing in the waters. All will be exterminated.

Anyone who invokes authors in discussion is not using his intelligence but his memory.

Art is never finished, only abandoned.

Savage is he who saves himself.

Reprove your friend in secret and praise him openly.