Otherness is a wonderful concept as long as it does not result into Oneself seeing itself as an illusory enemy. The primary purpose of otherness is companionship plain and simple. Feel free to change the word otherness with diversity or variation or whatever. You see, Oneself which I will call the Source, continuously births itself into its very own physical beingness drop by drop. The problem is that it cannot do this all at once. Rome wasn't built in a day. Neither did Oneself. The Source is indeed like water. Drip, drip, drip. All these drips create a stream and this stream is physical reality. Physical reality is the Source, it is Oneself. The problem happens when all these drops of water no longer realize they are but the Source, that they are but One stream, that they are but Oneself and that Love is the only purpose.