Abu Sulayman Sijistani
Abu Sulayman Muhammad Sijistani, (Persian: ابوسلیمان سجستانی) also called al-Mantiqi (the Logician) (c. 932 – c. 1000 CE), named for his origins in Sijistan or Sistan province in present-day Iran, became the leading philosopher of Islamic humanism in the Baghdad of his time.
Deeply religious, he regarded both religion and philosophy as valid and true; but separate, concerned with different issues, and proceeding by different means. He thus rejected the claims of the theologians employing Ilm al-Kalam to have built a theology "proved" by rationality and of the Brethren of Purity to offer a synthesis of philosophy and religion.
His best-known work is Siwān al-Ḥikma "Vessel of Wisdom", a history of philosophy from the beginning to his own time.
- Al-Sijistani, Abu Sulayman Muhammad, in Edward Craig (ed, 1998), Routledge Encyclopedia of Philosophy vol. 8. ISBN 0-415-18713-3.
- Kraemer, Joel L. (1986), Philosophy in the Renaissance of Islam: Abū Sulaymān Al-Sijistānī and His Circle, Brill Publishers, ISBN 90-04-07258-6