Medicine rests upon four pillars - philosophy, astronomy, alchemy, and ethics.

A mortal lives not through that breath that flows in and that flows out. The source of his life is another and this causes the breath to flow.

Life is like music, it must be composed by ear, feeling and instinct, not by rule. Nevertheless one had better know the rules, for they sometimes guide in doubtful cases, though not often.

All that man needs for health and healing has been provided by God in nature, the Challenge of science is to find it.

The art of healing comes from nature, not from the physician. Therefore the physician must start from nature, with an open mind.

Some children are born from heaven and others are born from hell, because each human being has his inherent tendencies, and these tendencies belong to his spirit, and indicate the state in which he existed before he was born.

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