Page:Essays on the Principles of Human Action (1835).djvu/97

 ber such and such events, since these different impressions are evidently referred to the same conscious being, which idea of individuality could never have been so much as conceived of if there were no other connection between our ideas than that which arises from the juxtaposition of the particles of matter on which they are severally impressed. The mere juxtaposition of the parts of the thinking substance on which different ideas are impressed will never produce any thing more than the actual juxtaposition of the ideas themselves, unaccompanied by any consciousness of their having this relation to each other: for the mind in this case consisting of nothing more than a succession of material points, each part will be sensible of the corresponding part of any object which is impressed upon it, but can know nothing of the impression which is made on any other part of the same substance, except from its reaction on the seat of the first, which is contrary to the supposition. In short, to attempt accounting at all for the nature of consciousness from the proximity of different impressions, or of their fluxional parts to each other in the brain seems no less absurd than it would be to imagine that by placing a number of persons together in a line we should produce in them an immediate consciousness and perfect knowledge of what was passing in each other's minds. If consciousness is to be deduced at all from the circumstance of place, it must be that different impressions occupy exactly the same place. One place has no identity with another: however thin the partition between one idea and another, the distinction must be as absolute and complete, and must confine each idea as effectually within its own bounds in this fantastical mosaic-work of the brain, as if a wall of brass or iron were interposed between each. There is another consideration to be attended to, which is that sensible impres-