But since an inward Principle can, of necessity, have only a potential existence, until called into action by some outward object, it is also clear that any similar effect, which shall then be recognized through it, from any number of differing and distinct objects, can only arise from some mutual relation between a _something_ in the objects and in the Principle supposed, as their joint result and proper product. And, since it would appear that we cannot avoid the admission of some such Principle, having a reciprocal relation to certain outward objects, to account for these kindred emotions from so many distinct and heterogeneous sources, it remains only that we give it a name; which has already been anticipated in the term Harmony. The next question here is, In what consists this _peculiar relation?_ We have seen that it cannot be in any thing that is essential to any condition of mere being or existence; it must therefore consist in some _undiscoverable_ condition indifferently applicable to the Physical, Intellectual, and Moral, yet only applicable in each to certain kinds. And this is all that we do or _can_ know of it. But of this we may be as certain as that we live and breathe. It is true that, for particular purposes, we may analyze certain combinations of sounds and colors and forms, so as to ascertain their relative quantities or collocation; and these facts (of which we shall hereafter have occasion to speak) may be of importance both in Art and Science. Still, when thus obtained, they will be no more than mere facts, on which we can predicate nothing but that, when they are imitated,--that is, when similar combinations of quantities, &c., are repeated in a work of art,--they will produce the same effect. But _why_ they should is a mystery which the reflective faculties do not solve; and never can, because it refers to a living Power that is above the understanding. In the human figure, for instance, we can give no reason why eight heads to the stature please us better than six, or why three or twelve heads seem to us monstrous. If we say, in the latter case, _because_ the head of the one is too small and of the other too large, we give no _reason_; we only state the _fact_ of their disagreeable effect on us. And, if we make the proportion of eight heads our rule, it is because of the fact of its being more pleasing to us than any other; and, from the same feeling, we prefer those statures which approach it the nearest. Suppose we analyze a certain combination of sounds and colors, so as to ascertain the exact relative quantities of the one and the collocation of the other, and then compare them. What possible resemblance can the understanding perceive between these sounds and colors? And yet a something within us responds to both in a similar emotion. And so with a thousand things, nay, with myriads of objects that have no other affinity but with that mysterious harmony which began with our being,