With this characteristic of uniformity we must closely connect that of _symmetry._ Form is unable long to rest in that barest abstraction of its determination, namely, undifferentiated equality. A diverse relation is sure to assert itself, breaking into the empty form of identity. In this way we obtain _symmetry_, which consists in no mere identical repetition of one form, but in a combination with some such form analogous to it, identical, that is to say, in its self-determination, and yet manifesting a distinct contrast with it. Through such a combination we obtain another kind of equality and unity, whose determination is more extensive and more varied. If, for example, on one side of a house we meet with three windows of the same size separated at equal intervals of distance, then three or four more of loftier size than the first-mentioned standing at more extended or closer intervals in relation to them, and again three more precisely similar in size and distance to our original ones, we have then before us a symmetrical arrangement. Mere uniformity and repetition of the same distinctions will never produce this result. We may find such distinguishing features in size, position, form, colour, tones, and many others like them, which, however, to produce symmetry must be harmoniously related to similar forms of construction. When we find a combination which presents to us an arrangement of such distinguishing characteristics according to some clearly uniform principle that then is symmetry.