Читать книгу Summa Theologica, Part I (Prima Pars) онлайн

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Now there are other relations which are realities as regards both extremes, as when for instance a habitude exists between two things according to some reality that belongs to both; as is clear of all relations, consequent upon quantity; as great and small, double and half, and the like; for quantity exists in both extremes: and the same applies to relations consequent upon action and passion, as motive power and the movable thing, father and son, and the like.

Again, sometimes a relation in one extreme may be a reality, while in the other extreme it is an idea only; and this happens whenever two extremes are not of one order; as sense and science refer respectively to sensible things and to intellectual things; which, inasmuch as they are realities existing in nature, are outside the order of sensible and intellectual existence. Therefore in science and in sense a real relation exists, because they are ordered either to the knowledge or to the sensible perception of things; whereas the things looked at in themselves are outside this order, and hence in them there is no real relation to science and sense, but only in idea, inasmuch as the intellect apprehends them as terms of the relations of science and sense. Hence the Philosopher says (Metaph. v) that they are called relative, not forasmuch as they are related to other things, but as others are related to them. Likewise for instance, "on the right" is not applied to a column, unless it stands as regards an animal on the right side; which relation is not really in the column, but in the animal.