The ego self is a property of the body and hence of the world. It is something like a field which manifests according to various modes of vibration, of which many are possible depending on the driving forces. It has no identity of its own but acquires one by virtue of its association with the self, which seems to produce a system of its modes. When two such fields come into proximity they affect each other in such a way that the one which deviates least from its native modes becomes the subject and the other the object. Or the two might form a coupled system with modes of its own. Simple interactions of this kind emerge as complex interaction of the phenomenal selves.