No fact is more instructive, in this respect, than one, which more than once we have had occasion to make use of; the association of the ideas of distance, extension, and figure, with the sensations of sight. I open my eyes; I see the tables, and chairs, the floor, the door, the walls of my room, and the books ranged upon the walls; some of these things at one distance, some at another; some of one shape and size, some of another. My belief is, that I see all those particulars. Yet the fact is, that I see nothing but certain modifications of light;[104] and that all my belief of seeing the distance, the size, and figure of those several objects, is nothing but the close and _inseparable_ association of the ideas of other senses. There is no room for even a surmise that there is any thing in this case but the immediate blending of the ideas of one sense with the sensations of another, derived from the constant concomitance of the sensations themselves. [Bain's footnote 104: More guardedly--'I am affected by certain modifications of light.' The word 'see' carries with it too much meaning for the case put. There is also the omission, previously remarked on, to take into account the mental elements due to the movements of the eye--visible forms, magnitudes, and movements.--_B._] The case of hearing is perfectly analogous, though {370} not so exact. I am in the dark; I hear the voice of one man, and say he is behind me; of another, and say he is before me; of another, he is on my right hand; another, on my left. I hear the sound of a carriage, and say, it is at one distance; the sound of a trumpet, and say, it is at another. In these cases I believe, not only that I hear a sound, but the sound of a man's voice, the sound of a carriage, the sound of a trumpet. Yet no one imagines that my belief is any thing, in these cases, but the close association of the sounds with the ideas of the objects. I believe, not only that I hear the sound of a man's voice, but that I hear it behind me, or before me; on my right hand, or on my left; at this distance, or at that. The indisputable fact, in the mean time, is, that I hear only a modification of sound, and that the position and distance, which I believe I hear, are nothing but ideas of other senses, closely associated with those modifications of sound. That this state of consciousness, the result of an immediate irresistible association, is identical with the state which we name belief, is proved by a very remarkable experiment, the deception produced by ventriloquism. A man acquires the art of forming that peculiar modification of sound, which would come from this or that position, different from the position he is in; in other words, the sound which is associated, not with the idea of the position he is in, but that of another position. The sound is heard; the association takes place; we cannot help believing that the sound proceeds from a certain place, though we know, that is,