and "The One" was at the highest level, with the "Soul" at the lowest. For Plotinus, the relationship between the three elements of his trinity is conducted by the outpouring of logos from the higher principle, and eros (loving) upward from the lower principle. Plotinus relied heavily on the concept of logos, but no explicit references to Christian thought can be found in his works, although there are significant traces of them in his doctrine. Plotinus specifically avoided using the term logos to refer to the second person of his trinity. However, Plotinus influenced Gaius Marius Victorinus, who then influenced Augustine of Hippo. Centuries later, Carl Jung acknowledged the influence of Plotinus in his writings. Victorinus differentiated between the logos interior to God and the logos related to the world by creation and salvation. Augustine of Hippo, often seen as the father of medieval philosophy, was also greatly influenced by Plato and is famous for his re-interpretation of Aristotle and Plato in the light of early Christian thought. A young Augustine experimented with, but failed to achieve ecstasy using the meditations of Plotinus. In his Confessions, Augustine described logos as the Divine Eternal Word, by which he, in part, was able to motivate the early Christian thought throughout the Hellenized world (of which the Latin speaking West was a part) Augustine's logos had taken body in Christ, the man in whom the logos (i.e. or ) was present as in no other man. Islam The concept of the logos also exists in Islam, where it was definitively articulated primarily in the writings of the classical Sunni mystics and Islamic philosophers, as well as by certain Shi'a thinkers, during the Islamic Golden Age. In Sunni Islam, the concept of the logos has been given many different names by the denomination's metaphysicians, mystics, and philosophers, including ʿaql ("Intellect"), al-insān al-kāmil ("Universal Man"), kalimat Allāh ("Word of God"), haqīqa muḥammadiyya ("The Muhammadan Reality"), and nūr muḥammadī ("The Muhammadan Light"). ʿAql One of the names given to a concept very much like the Christian Logos by the classical Muslim metaphysicians is ʿaql, which is the "Arabic equivalent to the Greek (intellect)." In the writings of the Islamic neoplatonist philosophers, such as al-Farabi () and Avicenna (d. 1037), the idea of the ʿaql was presented in a manner that both resembled "the late Greek doctrine" and, likewise, "corresponded in many respects to the Logos Christology."