He who does not understand astrology is not a doctor but a fool.

There are, in effect, two things, to know and to believe one knows; to know is science; to believe one knows is ignorance.

Life is short, art long, opportunity fleeting, experiment uncertain, and judgment difficult.

In all abundance there is lack.

It is better to be full of drink than full of food.

Where prayer, amulets and incantations work it is only a manifestation of the patient's belief.

I will give no deadly medicine to any one if asked, nor suggest any such counsel; and in like manner I will not give to a woman a pessary to produce abortion.