From The Influence of Origen on the Young Augustine by Gyorgy Heidl:

Hinting at Col. 2:8, Augustine makes a distinction between the philosophers and, accordingly, between two worlds.18 The reasoning is strongly Origenian both in form and content. The two thinkers claim that there is another world (alius mundus – [Greek]) which is intelligible (intellectus intuetur – [Greek]), which cannot be reached by sensation (ab istis oculis remotissimus – [Greek]), which only those who are pure (sanorum intellectus – [Greek]) can behold (intuetur – [Greek]), which Christ speaks about in St. John’s Gospel (regnum meum non est de hoc mundo – [Greek]),19 and, finally, which is identical to divine Wisdom itself (sapientia – [Greek]).20

According to Augustine, the philosophy of the other world is not merely Platonism or Neoplatonism but also Christianity. In addition, it is only the latter which is capable of calling sinful souls back to the intelligible world.21 Therefore, Christianity is considered the “true” or “truest philosophy” (verissima philosophia)22 which teaches the unity of the Trinity and the Incarnation of the Divine Intellect.23