The knowledge of anything, since all things have causes, is not acquired or complete unless it is known by its causes. — Avicenna Copy Share Image
Now it is established in the sciences that no knowledge is acquired save through the study of its causes and beginnings, if… — Avicenna Copy Share Image
The world is divided into men who have wit and no religion and men who have religion and no wit. — Avicenna Copy Share Image
Leeches should be kept a day before applying them. They should be squeezed to make them eject the contents of their stomachs. — Avicenna Copy Share Image
Pain is a sensation produced by something contrary to the course of nature and this sensation is set up by one of two circumstances:… — Avicenna Copy Share Image
Those who deny the first principle should be flogged or burned until they admit that it is not the same thing to be burned… — Avicenna Copy Share Image
But the fact is that when wine is taken in moderation, it gives rise to a large amount of breath, whose character is balanced,… — Avicenna Copy Share Image
Pure earth does not petrify, because the predominance of dryness over [i.e. in] the earth endows it not with coherence but rather with crumbliness.… — Avicenna Copy Share Image
It is in the nature of water ... to become transformed into earth through a predominating earthy virtue; ... it is in the nature… — Avicenna Copy Share Image
“Anyone who denies the law of non-contradiction should be beaten and burned until he admits that to be beaten is not the same as… — Avicenna Copy Share Image
“I would rather have a short life with width rather than a narrow one with length.” — Avicenna Copy Share Image
The theory of medicine, therefore, presents what is useful in thought, but does not indicate how it is to be applied in practice-the mode… — Avicenna Copy Share Image
