The other does not exist: this is rational faith, the incurable belief of human reason. Identity=reality, as if, in the end, everything must necessarily and absolutely be one and the same. But the other refuses to disappear; it subsists, it persists; it is the hard bone on which reason breaks its teeth. Abel Martin, with a poetic faith as human as rational faith, believed in the other, in “the essential Hetergeneity of being”, in what might be called the incurable otherness from which oneness must always suffer.

-Antonio Machado