Quotes by : Avicenna

The world is divided into men who have wit and no religion and men who have religion and no wit.

The knowledge of anything, since all things have causes, is not acquired or complete unless it is known....

Therefore in medicine we ought to know the causes of sickness and health.

Anyone who denies the law of non-contradiction should be beaten and burned until he admits that to be....

Now it is established in the sciences that no knowledge is acquired save through the study of its causes....