The notion of inside and outside, of withiness and withoutness, is extended to experience from the scheme of your body in space. When you try to locate your thoughts they seem to be inside your head, in a little space somewhere behind your eyes. This is then contrasted with the space outside your skin where every sort of sensory object is located. With some effort you can move these 'objective' sensory contents inside, or at least make their space of occurrence continuous with the inner thought stage. This is done by attending to the feeling associated with each such sensed content. It is relatively easy to do with touch, taste and smell, these are modalities one component of which is already a distinctive feel, they are easily relocated from the outside world to the bodily surface in which the respective sense organs lie and then turned to face inwards. It is a little harder to do with hearing, but the same principle applies. A non-verbal sound can be converted into a pure timbre, extracted from its context of meaning, whereupon it becomes a form of bodily sensation. A little more effort is required with talk. In this case it helps to focus on how they are embedded in a pre-existing web of associations and meanings. Greater effort still is needed with vision, but again it is possible in principle to draw it entirely inside, to reduce every aspect of so-called outer experience to its inner counterpart, to the sphere of 'ownness'. But all of this merely dissolves the inside/outside metaphor. There is still something unsatisfactory about the inner space that is discovered in this way, you feel that it is not as far inside as it needs to go, but now the rough compass-bearings that you used to perform the first reduction are no longer available. What makes you think there is a further inside to the inside? This where the sense of 'I' ceases being a convenient shorthand for self-reference and become a peculiarly uncompleted feeling, a partial or incipient feeling that teases you with its elusiveness.