Every physician must be rich in knowledge, and not only of that which is written in books; his patients should be his book, they will never mislead him.

If we want to make a statement about a man's nature on the basis of his physiognomy, we must take everything into account; it is in his distress that a man is tested, for then his nature is revealed.

All things are poisons. It is simply the dose that distinguishes between a poison and a remedy.

From time immemorial artistic insights have been revealed to artists in their sleep and in dreams, so that at all times they ardently desired them.

Consider that we shouldn't call our brother a fool, since we don't know ourselves what we are.

Magic has power to experience and fathom things which are inaccessible to human reason. For magic is a great secret wisdom, just as reason is a great public folly.

Poison is in everything, and no thing is without poison. The dosage makes it either a poison or a remedy.