Étienne Gilson in the context of "Descartes"

Avicennism is a school of Islamic philosophy which was established by Avicenna. He developed his philosophy throughout the course of his life after being deeply moved and concerned by the Metaphysics of Aristotle and studying it for over a year. According to Henry Corbin and Seyyed Hossein Nasr, there are two kinds of Avicennism: Islamic Avicennism, and Latin Avicennism.

According to Nasr, the Latin Avicennism was based on the former philosophical works of Avicenna. This school followed the Peripatetic school of philosophy and tried to describe the structure of reality with a rational system of thinking. In the twelfth century AD, it became influential in Europe, particularly in Oxford and Paris, and affected some notable philosophers such as Thomas Aquinas, Roger Bacon and Duns Scotus. While the Latin Avicennism was weak in comparison with Latin Averroism, according to Étienne Gilson there was an "Avicennising Augustinism".

Christian philosophy includes philosophies carried out by Christians or in relation to the religion of Christianity. Christian philosophy emerged with the aim of reconciling science and faith, starting from natural rational explanations with the help of Christian revelation. Several thinkers such as Origen and Augustine of Hippo believed that there was a harmonious relationship between science and faith, others such as Tertullian claimed that there was contradiction; others tried to differentiate them.

There are scholars who question the existence of a Christian philosophy itself. These claim that there is no originality in Christian thought, and its concepts and ideas are inherited from Greek philosophy. Thus, Christian philosophy would protect philosophical thought, which would already be definitively elaborated by Greek philosophy. However, Catholic scholars Philotheus Boehner and Étienne Gilson claim that Christian philosophy is not a simple repetition of ancient philosophy, although they owe to Greek science the knowledge developed by Plato, Aristotle and the Neoplatonists. They even claim that in Christian philosophy, Greek culture survives in organic form.

Henry Corbin (14 April 1903 – 7 October 1978) was a French philosopher, theologian, and Iranologist, professor of Islamic studies at the École pratique des hautes études. He was influential in extending the modern study of traditional Islamic philosophy from early falsafa to later and "mystical" figures such as Suhrawardi, Ibn Arabi, and Mulla Sadra Shirazi. With works such as Histoire de la philosophie islamique (1964), he challenged the common European view that philosophy in the Islamic world declined after Averroes and Avicenna.

Born into a Catholic family, he converted to Protestantism between 1927 and 1930. He received a Catholic education, obtaining a certificate in Scholastic philosophy from the Catholic Institute of Paris at age 19. Three years later he took his "license de philosophie" under the Thomist thinker Étienne Gilson. He studied modern philosophy, including hermeneutics and phenomenology, becoming the first French translator of Martin Heidegger. On 13 October 1929, Louis Massignon (director of Islamic studies at the Sorbonne) introduced him to Suhrawardi, the 12th-century Persian Muslim thinker. In a late interview, Corbin said: "through my meeting with Suhrawardi, my spiritual destiny ... was sealed. Platonism, expressed in terms of the Zoroastrian angelology of ancient Persia, illuminated the path that I was seeking." He thus dedicated himself to understanding Iranian Islam, which he believed esoterically expressed older perennial insights related to Zoroastrianism and Platonism.