"They would not exist for us? They would exist for us if they gave us pain. Suppose it was not the pain of heat or cold or any of the pains we know, but a new pain? Suppose they touched something besides our nerves—reached our brains in a new and terrible way? Suppose they made themselves felt in a new and strange and unspeakable way? What could we do? Our hands would be tied. You cannot oppose what you cannot see or feel. You cannot oppose the thousand-dimensional. Suppose they should eat their way to us through space!"