because I should then be nothing more than a part of a whole, of which all others would be equally members with myself. This distinction, however, subsists as necessarily and completely between myself and those who most nearly resemble me, as between myself and those whose characters and properties are the very opposite to mine. Indeed, the distinction itself becomes marked and intelligible in proportion as the objects or impressions themselves are intrinsically the same, as then it is impossible to mistake the true principle on which it is founded, namely, the want of any direct communication between the feelings of one being and those of another. This will shew why the difference between ourselves and others appears greater to us than that between other individuals, though it is not really so. Considering mankind in this twofold relation, as they are to themselves, or as they appear to one another, as the subjects of their own thoughts, or the thoughts of others, we shall find the origin of that wide and absolute distinction which the mind feels in comparing itself with others, to be confined to two faculties, viz., sensation, or rather consciousness, and memory. To avoid an endless subtilty of distinction, I have not given here any account of consciousness in general; but the same reasoning will apply to both. The operation of both these faculties is of a perfectly exclusive and individual nature, and so far as their operation extends (but no farther) is man a personal, or if you will, a selfish being. The sensation excited in me by a piece of red-hot iron striking against any part of my body is simple, absolute, terminating as it were in itself, not representing any thing beyond itself, nor capable of being represented by any other sensation, or communicated to any other being. The same kind of sensation may be indeed excited in another by the same means, but this sensation will not imply any reference to, or consciousness of mine; there is no communication between my nerves and another’s brain, by which he can be affected with my sensations as I am myself. The only notice or perception which another can have of this sensation in me, or which I can have of a similar sensation in another, is by means of the imagination. I can form an imaginary idea of that pain as existing out of myself; but I can only feel it as a sensation when it is actually impressed on myself. Any impression made on another can neither be the cause nor object of sensation to me. Again, the impression or idea left in my mind by this sensation, and afterwards excited either by seeing iron in the same state, or by any other means, is properly an idea of memory. This recollection necessarily refers to some previous impression in my own mind, and only exists in consequence of that impression, or of the continued connexion of the same mind with itself: it cannot be derived from any impression made on another. My