Iamblichus, De mysteriis, vi.
The system culminates in a mystical act, and in the sequel, especially with Iamblichus and the Syrian Neoplatonists, mystical practice tended more and more to overshadow the theoretical groundwork.
There is a curious reference to Iamblichus, apparently the neo-platonist philosopher, whose name Jordanes, being, as he says himself, agrammatus, inserts by way of a flourish.
CHRYSANTHIUS, a Greek philosopher of the 4th century A.D., of the school of Iamblichus.
Taylor at p. 362 of his version of Iamblichus.