TWO:We have said that the founder of Neo-Platonism contrived to blend the systems of his two great authorities in such a manner as to eliminate much of the relative truth which is contained in each of them taken by itself. It has been reserved for modern thought to accomplish the profounder synthesis which has eliminated their errors in combining their truths. Yet, perhaps, no other system would have satisfied the want of the time so well as that constructed by Plotinus out of the materials at his disposal. Such as it was, that system held its ground as the reigning philosophy until all independent thinking was suppressed by Justinian, somewhat more than two and a half centuries after its author��s death. Even then it did not become extinct, but reappeared in Christian literature, in the writings attributed to Dionysius the Areopagite, and again in the daring speculations of Erigena, the father of mediaeval philosophy, to pass under more diluted forms into the teaching of the later Schoolmen, until the time arrived for its renewed study in the original sources as an element of the Platonic revival in the fifteenth century. All this popularity proves, as we say, that Plotinus suited his own age and other ages which reproduced the same general intellectual tendencies. But the important thing was that he made Plato and Aristotle more interesting, and thus led men to study their writings more eagerly than before. The true reign of those philosophers does not begin until we reach the Middle Ages, and the commanding position which they then enjoyed was due, in great measure, to the revolution effected by Plotinus.