(_b_) The points of fundamental importance, which emphasize the dwelling-house as the basic type of the temple, may be in all essential particulars enumerated as follows. If we consider with closer attention the house in its mechanical relation to itself we shall find, in accordance with what we have already stated, on the one hand, masses of architectural form which serve as _support_ and, on the other, those that _are supported_ both being united for stability and security. Thirdly, we have before us the definite aspect of enclosure and limitation according to the three dimensions of length, breadth, and height. A construction, moreover, which, by the fact of its being a mutual correlation of definite aspects distinct from each other, is a concrete whole, is bound to declare this unity in its constitution. So we find here that essential differences arise which perforce assert themselves no less in their division and specific elaboration than they do in their rational _connexus._ (_α_) Of first importance in this respect to consider is the aspect of service in the way of _support._ When we speak of masses that support we commonly, under the influence of every-day needs, think of the wall as the most secure and reliable means of support. Support as such, however, as we have already seen, is not the exclusive principle of the wall; for the wall serves essentially as a means of enclosure and connection, and for this reason is a predominant feature in the romantic type of building. What is the peculiarity of Greek architecture is this, that it gives direct form to the principle of support by itself, and for this object employs columns as a fundamental contribution to the purpose and beauty of its architecture. (_αα_) The aim of the column is to support and only this; and although a series of columns set up in a straight line make a boundary, such an enclosure falls short of a secure wall or partition, and is, in fact, expressly cancelled by the genuine partition and placed in a position of free independence. Owing to this exclusive object of support which pertains to the column, it is of first importance that it should display the aspect of such a purpose relatively to the weight which rests upon it. Consequently it should neither be too strong nor too slender, nor again too compressed, not mount upwards to such a height and with such ease as though the weight upon it was not treated seriously.