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 of operation of these principles. The theory, when mastered, gives us a certain kind of knowledge.… — Avicenna Copy Share
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, and whose luminosity is strong and brilliant. Hence wine disposes greatly to gladness, and the person is subject to quite trivial exciting agents. The breath now takes up the impression of agents belonging to the present… — Avicenna Copy Share
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 of operation of these principles. The theory, when mastered, gives us a certain kind of knowledge. Thus we say, for example, there are three forms of fevers and nine constitutions. The practice of medicine is not… — Avicenna Copy Share
![“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. In general, stone is formed in two ways only (a) through the hardening of clay, and (b) by the congelation [of waters].” quote by Avicenna](https://sms4smile.com/quotes/img-quotes/4b0/avicenna-19211_clay_pure-earth-does-not-petrify-because-the_878916.jpg)
