Muhammad ibn Zakariya ar-Razi
Abū Bakr Muhammad ibn Zakariya ar-Razi (Arabic: أبو بكر محمد بن زكريا الرازي, Persian: زكريای رازی Zakariā-ye Rāzi; Latin: Rhazes or Rasis) was a Persian alchemist, chemist, physician, philosopher and scholar. According to Biruni, Razi was born in Rayy, Iran in the year 865 (251 AH) and died there in 925 (313 AH)
- Let your first thought be to strengthen your natural vitality.
- Truth in medicine is an unattainable goal, and the art as described in books is far beneath the knowledge of an experienced and thoughtful physician.
- How can anyone think philosophically while listening to old wives' tales founded on contradictions, which obdurate ignorance, and dogmatism?
- Gentility of character, friendliness and purity of mind, are found in those who are capable of thinking profoundly on abstruse matters and scientific minutiae.
- Man should hasten to protect himself from love before succumbing to it and cleanse his soul from it when he falls.
- The self-admirer, generally, should not glorify himself nor be so conceited that he elevates himself above his counterparts. Neither should he belittle himself to such an extent that he becomes inferior to his own peers or to those who are inferior both to him and to his fellowmen in the eyes of others. If he follows this advice, he will be freed from self-admiration and feelings of inferiority, and people will call him one who truly knows himself.
- [Envy] results from an accumulation of stinginess and avarice in the soul, being one of the diseases that cause serious harm to the soul.