IN many of the varied pictures which have come on to us from nineteenth-century poetry, we find a state of mind described by the word "doubling" (division into two); and this word was so frequently used in popular books of days gone by that it has entered our common language in Italy, where we all, on occasion, speak of the "doubling of consciousness."
But to grasp this notion clearly, we must not confuse it, as it is often confused, with what might be called "normal division," or "consciousness of consciousness." It need not be said that a person is continually re-presenting his impulses and actions to his own mind, visualising, analysing, criticising them: he is continually dividing his consciousness into two parts, one of which is actor, the other spectator. But the "doubling," here is only apparent: what is seemingly a division is nothing but unity itself. Unity of consciousness can-