Aristotle
The main axis around which the main themes of the falsafa orbited began with the introduction of the themes brought by Aristotle. His image in the medieval Muslim world is that of the “Philosopher” par excellence in relation to whom all thought is defined: both pure philosophical and scientific.
Despite the rigor with which the translations were made, texts mistakenly attributed to Aristotle, meant that "Aristutalis" in Arabic had a Neoplatonic character, mainly due to the work Theology of Aristotle, paraphrased extracts from an unknown author based on Plotinus' Enneads, bringing doctrines that Aristotle himself did not enunciate in any of his works.
What might seem like a historical misunderstanding of the entry of elements of Plotinus' philosophy under the name of Aristotle, ended up becoming one of the central pillars of the construction of Al-Farabi and Avicenna's systems.
Aristotle became known among the Arabs as the First Master and his name was used in many of the works and commentaries made by Arabic-speaking philosophers, the falasifa. It is also worth noting that Aristotle's thought also influenced Arab poets, philologists, grammarians and jurists.
Aristotle's works have been translated in their entirety, perhaps except for The Politics, either directly from Greek or through Syriac. All these Arabic translations have reached us.