The universities do not teach all things ... so a doctor must seek out old wives, gypsies, sorcerers, wandering tribes, old robbers, and such outlaws and take lessons from them. A doctor must be a traveller . . . Knowledge is experience.

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.

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.

What we should be after death, we have to attain in life, i.e. holiness and bliss. Here on earth the Kingdom of God begins.

This is alchemy, and this is the office of Vulcan; he is the apothecary and chemist of the medicine.

What the eyes perceive in herbs or stones or trees is not yet a remedy; the eyes see only the dross.

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