Book chapter in Études syriaques 16 on late medieval encounters between Syriac and Arabo-Islamic philosophy. In particular, I examine the historical processes that led to the transformation of Syriac Christian philosophical praxis from its Greco-Arabic origins to its assimilation of post-Avciennan ideas from the 12th to 13th centuries. To this end, my contribution explores two hitherto unstudied works: a commentary on the Organon by Dionysius bar Ṣalībī (d. 1171) and the metaphysics of a philosophical compendium entitled the Book of Dialogues of Jacob bar Šakkō (1241).