"The more brilliant the lightning, the quicker it disappears."

"Leeches should be kept a day before applying them. They should be squeezed to make them eject the contents of their stomachs."

"The physician must be a man of patience, for patience is the key to healing."

"The proof of the existence of the soul is that you doubt."

"The physician must be a man of wisdom, for wisdom is the foundation of medicine."