Page:Essays on the Principles of Human Action (1835).djvu/69

 acted upon by them. To give an instance which just occurs to me. Suppose there are two gold-headed canes standing together in the corner of the room. I of course consider each of them as the same cane. This is not from the similarity of the gold to the wood. But the two gold-heads together would not if taken off, at all answer the purpose of a cane, and the two canes together would be more than I should want. Nor is it simply from the contiguity of the parts (for the canes themselves are supposed to touch one another), but from their being so united that by moving any part of one of them, I of necessity move the whole. The closest connection between my ideas is formed by that relation of things among themselves, which is most necessary to be attended to in making use of them, the common concurrence of many things to some given end: for example, my idea of the walking-stick is defined by the simplicity of the action necessary to wield it for that particular purpose. It seems hardly possible, however, to define the different degrees or kinds of identity in the same thing by any general rule. Thus we say the same tree, the same forest, the same river, the same field, the same country, the same world, the same man, &c. The nature of the thing will best point out the sense in which it is said to be the same.