Supreme happiness will be the greatest cause of misery, and the perfection of wisdom the occassion of folly.

In the days of thy youth seek to obtain that which shall compensate the losses of thy old age.

The smallest feline is a masterpiece.

The Book of the science of Mechanics must precede the Book of useful inventions.

Fire destroys falsehood, that is sophistry, and restores truth, driving out darkness.

I abhor the supreme folly of those who blame the disciples of nature in defiance of those masters who were themselves her pupils

O Time with your teethy years! You swallow up all things little by little in a slow-motion, wrinkling process of dying.