Unity-in-perception is due to the passive synthesis that is prior to any kind of active and conscious achievement. It is an "ur-unity," an "ur-synthesis." The relation of ur-unity to aspectslphases is structural. The passive synthesis is a kind of fusing of various, manifold phases and aspects. This fusing is the pre-conscious continuity which is the transition. This transition is the fusion of both aspects, i.e., the synthesis of coincidence which goes through aspects. This going-through, or running-through of streaming is the presubjective time-stream.