It is true that the difficulties of thought to which we have alluded were not removed by the new teaching, but only clothed in a different garb. They reappeared in the form of questions such as — How are the ?eeting individual things connected with their eternal archetypes? Do they participate in them, or are they copied from them? And what is the precise nature of this participation or process of copying? To these questions Plato never succeeded in returning a satisfactory answer; but, as Aristotle remarks in the above-quoted passage, he left them to be investigated by others.