"Just as a lamp waved in darkness creates a figure of light in the air, which remains for as long as the lamp repeats its motion exactly, so the universe retains its shape by repetition: the universe is Time's body. And how will we perceive this body? And how operate on it? Not by the means we perceive extension, relation, color, form — the qualities of Space. … No: but by the means we perceive duration and repetition and change: by Memory."