He who does not understand that a dead lion is more alive than a living dog will remain a dog.

Astrology is a disease, not a science... It is a tree under the shadow of which all sorts of superstitions thrive. ... Only fools and charlatans lend value to it.

Commune with your own heart upon your bed, and be still.

Inspire me with love for my art and for thy creatures. In the sufferer let me see only the human being.

To sum up: I am the man who when the concern pressed him and his way was straitened and he could find no other device by which to teach a demonstrable truth other than by giving satisfaction to a single virtuous man while displeasing ten thousand ignoramuses - I am he who prefers to address that single man by himself, and I do not heed the blame of those many creatures.

Lose with truth and right rather than gain with falsehood and wrong.

The goal of good health is to enable a person to acquire wisdom.