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436 is no less barren and graceless in metaphysics. You must have plurality to start with, or trinity, or at least duality, if you wish to get anywhere, even if you wish to get effectively into the bosom of the One, abandoning your separate existence. Freud, like Empedocles, has prudently introduced a prior principle for Love to play with; not Strife, however (which is only an incident in Love) but Inertia, or the tendency towards peace and death. Let us suppose that matter was originally dead, and perfectly content to be so, and that it still relapses, when it can, into its old equilibrium. But the homogeneous (as Spencer would say) when it is finite is unstable: and matter, presumably not being coextensive with space, necessarily forms aggregates which have an inside and an outside. The parts of such bodies are accordingly differently exposed to external influences and differently related to one another. This inequality, even in what seems most quiescent, is big with changes, destined to produce in time a wonderful complexity. It is the source of all uneasiness, of life, and of love.

"Let us imagine [writes Freud ] an undifferentiated vesicle of sensitive substance: then its surface, exposed as it is to the outer world, is by its very position differentiated, and serves as an organ for receiving stimuli. Embryology, repeating as it does the history of evolution, does in fact show that the central nervous system arises from the ectoderm; the grey cortex of the brain remains a derivative of the primitive superficial layer This morsel of living substance floats about in an outer world which is charged with the most potent energies, and it would be destroyed if it were not furnished with protection against stimulation. It acquires this through  a special integument or membrane The outer layer, by its own death, has secured all the deeper layers from a like fate It must suffice to take little samples of the outer world, to taste it, so to speak, in small quantities. In highly developed organisms the receptive external layer of what was once a vesicle has long been withdrawn into the depths of the body, but portions of it have been left on the surface immediately beneath the common protective barrier. These portions form the sense-organs. [On the other hand] the sensitive cortical