Hence Couliano’s bizarrely beautiful introduction to The Tree of Gnosis, where he begins to explore what is essentially a Platonic model of historiography, with hyperdimensional idealist forms interacting in three-dimensional historical time with different actors and movements as these forms play out their different cognitive possibilities.58 Basically, he was writing of the interaction of eternity and time. Hence, also, his little potent essay, “A Historian’s Toolkit for the Fourth Dimension.”59 Husserl would have loved this. So would have Corbin.