Neoplatonism is the modern name for the philosophy founded by Plotinus in the third century and developed by Porphyry, Iamblichus and Proclus. It describes reality as flowing from the One and the soul’s path back through purification and contemplation. It shaped Christian, Islamic and Jewish mysticism.
Neoplatonism
The late ancient Platonism of Plotinus and his successors, centred on the One and the soul’s return.
Also: Neo-Platonism