ABSTRACT
Since all perceptible impressions on our body consist of movements affecting the body and causing changes in our nerves, the object of our sensations should appear to us to reside always in those organs by which we experience those sensations. Indeed, this seems to apply to many of our sensations. In regions which are not sensory organs we have only this kind of sensation. However by means of our developed sense-organs, we also receive other sensations, by which objects remote from the sense-organs are believed to be perceived. The sensations of light, and dark, and colour are pure sensations; but we are interpreting whenever we feel that light, dark or colour is situated either within or in front of us, possessing a shape, or whether it is stationary or moving.
