What is true of Elias is true of every one in his own place and degree. We call rationality the distinction of man, when compared with other animals. This is true in logic; but in fact a man differs from a brute, not in rationality only, but in all that he is, even in those respects in which he is most like a brute; so that his whole self, his bones, limbs, make, life, reason, moral feeling, immortality, and all that he is besides, is his real _differentia_, in contrast to a horse or a dog. And in like manner as regards John and Richard, when compared with one another; each is himself, and nothing else, and, though, regarded abstractedly, the two may fairly be said to have something in common, (viz. that abstract sameness which does not exist at all,) yet, strictly speaking, they have nothing in common, for each of them has a vested interest in all that he himself is; and, moreover, what seems to be common in the two, becomes in fact so uncommon, so _sui simile_, in their respective individualities—the bodily frame of each is so singled out from all other bodies by its special constitution, sound or weak, by its vitality, activity, pathological history and changes, and, again, the mind of each is so distinct from all other minds, in disposition, powers, and habits,—that, instead of saying, as logicians say, that the two men differ only in number, we ought, I repeat, rather to say that they differ from each other in all that they are, in identity, in incommunicability, in personality. Nor does any real thing admit, by any calculus of logic, of being dissected into all the possible general notions which it admits, nor, in consequence, of being recomposed out of them; though the attempt thus to treat it is more unpromising in proportion to the intricacy and completeness of its make. We cannot see through any one of the myriad beings which make up the universe, or give the full catalogue of its belongings. We are accustomed, indeed, and rightly, to speak of the Creator Himself as incomprehensible; and, indeed, He is so by an incommunicable attribute; but in a certain sense each of His creatures is incomprehensible to us also, in the sense that no one has a perfect understanding of it but He. We recognize and appropriate aspects of them, and logic is useful to us in registering these aspects and what they imply; but it does not give us to know even one individual being. So much on logical argumentation; and in speaking of the syllogism, I have spoken of all inferential processes whatever, as expressed in language, (if they are such as to be reducible to science,) for they all require general notions, as conditions of their coming to a conclusion.