In this country, the name of Mullah Sadra is known to very few specialists, while contemporary western scholars consider Sadra one of the classics of Muslim culture. These points define the structure and the content of this paper: what the word Islamic means in relation to philosophy and what caused such a high assessment of this person's creativity. In the first part, the author notes that any worldview reflects three attitudes of a person to the world, and on this basis then defines the difference in Islamic, Christian and Buddhist world outlooks. The second part is the description of the life path of ad-Din Shirazi from his discipleship, when his mentors were Mir Damad and Sheikh ul Islam Baha'i, up to his return to Shiraz. Here the author dwells on the motives of Sadra's «hermitage» in Kohak. The specifics of Islamic philosophy is the subject of the third section. The author considers the views of S. Meisami, M. Bilalov and O. Limen and concludes that the solution to this problem is not yet visible. In this regard, the heuristic potential of A. Smirnov’s «logical-semantic» theory suggesting to consider this specificity through the prism of relationship between the linguistic and conceptual (logical) pictures of the world, is discussed. The conclusion summarizes the author's reflections on the specifics of Arab-Muslim philosophy and Sadra's role in its development.