The fourth/tenth-century Ṣiwān al-ḥikma is one of the most important doxographic and gnomologic texts in Arabic and was most instrumental in the transmission of philosophical knowledge from Greek into Arabic. Despite its importance, the original text has been lost and the book is known to us only in excerpts, one of which, Muntakhab Ṣiwān al-ḥikma, was so successful that it probably replaced the original. The identity of the Muntakhab’s compiler, who was also the author of Itmām Tatimmat Ṣiwān al-ḥikma, an (...) anthology of Arabic poetry written by philosophers of the Islamic period, is to date unknown. Following a suggestion made by Muḥammad Taqī Dānishpazhūh in 1959, this article produces strong evidence that it was Muʿīn al-Dīn Abū l-Aʿlā Muḥammad b. Maḥmūd al-Nīsābūrī al-Ghaznawī, and describes his life and works. (shrink)