For if I say that my foot hurts, I do not simply mean that it is a cause of pain in the same way as the nail which is cutting into it, differing only in being nearer to me; I do not mean that it is the last of the objects in the external world, after which a more intimate kind of pain should begin, an unlocalized awareness of pain in itself, related to the foot only by some causal connection and within the closed system of experience.