For, supposing a rational spirit be the idea of a MAN, it is easy to know what is the same man, viz. the same spirit—whether separate or in a body—will be the SAME MAN. Supposing a rational spirit vitally united to a body of a certain conformation of parts to make a man; whilst that rational spirit, with that vital conformation of parts, though continued in a fleeting successive body, remains, it will be the SAME MAN. But if to any one the idea of a man be but the vital union of parts in a certain shape; as long as that vital union and shape remain in a concrete, no otherwise the same but by a continued succession of fleeting particles, it will be the SAME MAN. For, whatever be the composition whereof the complex idea is made, whenever existence makes it one particular thing under any denomination, THE SAME EXISTENCE CONTINUED preserves it the SAME individual under the same denomination. CHAPTER XXVIII. OF OTHER RELATIONS. 1. Ideas of Proportional relations. BESIDES the before-mentioned occasions of time, place, and causality of comparing or referring things one to another, there are, as I have said, infinite others, some whereof I shall mention. First, The first I shall name is some one simple idea, which, being capable of parts or degrees, affords an occasion of comparing the subjects wherein it is to one another, in respect of that simple idea, v.g. whiter, sweeter, equal, more, &c. These relations depending on the equality and excess of the same simple idea, in several subjects, may be called, if one will, PROPORTIONAL; and that these are only conversant about those simple ideas received from sensation or reflection is so evident that nothing need be said to evince it. 2. Natural relation.