Ensō is Self realizing it is One.

It is not that the world is not real for it is; it is just that the wor(l)d is really one not wanting to be alone and this one is self. As such ensō is self realizing all diversity is self-desired, self-created and self-perceived so self would not be by itself. For so self is; self is diverse for companionship. Self is diverse for friendship. Self is diverse for love.
~ Wald Wassermann