avicenna quotes

That whose existence is necessary must necessarily be one es...

Therefore in medicine we ought to know the causes of sicknes...

The knowledge of anything, since all things have causes, is ...

Medicine considers the human body as to the means by which i...

As to the mental essence, we find it in infants devoid of ev...

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

Now it is established in the sciences that no knowledge is a...