أبو بكر محمد بن زكريا الرازي · Abū Bakr Muḥammad ibn Zakarīyā al-Rāzī
Al-Rāzī combined influential medical practice with an independent philosophical ethics that defended reason, a good life in this world, and a controversial account of creation.
Intellectual setting
In the ninth- and tenth-century Persian and Abbasid worlds, al-Rāzī wrote for hospitals, courts, and learned readers while engaging Greek medicine and competing Islamic theological positions.
Key ideas
The five eternals
Reports attribute to him five eternal principles—God, soul, matter, time, and place—rather than creation from nothing alone.
Philosophical way of life
His ethical counsel treats philosophical reflection and moderation as practical means for freeing the soul from harmful passions.
Legacy
He became one of the most important physicians in Arabic and Latin medicine, while the surviving reports of his religious criticism and metaphysics remain subjects of careful reconstruction.