Anyone who imagines that all fruits ripen at the same time as the strawberries knows nothing about grapes.

All things are poisons, for there is nothing without poisonous qualities. It is only the dose which makes a thing poison.

The beginning of wisdom is the beginning of supernatural power.

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.

The spirit is the master; imagination the tool, and the body the plastic material ...The power of the imagination is a great factor in medicine. It may produce diseases in man and in animals, and it may cure them ..Ills of the body may be cured by physical remedies or by the power of the spirit acting through the soul.

Nature also forges man, now a gold man, now a silver man, now a fig man, now a bean man.

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.