Page - 1129 - in The Complete Plato

I do not know what you mean. Well, you know of course that the greater is relative to the less? Certainly. And the much greater to the much less? Yes. And the sometime greater to the sometime less, and the greater that is to be to the less that is to be? Certainly, he said. And so of more or less, and of other correlative terms, such as the double and the half, or, again, the heavier and the lighter, the swifter and the slower; and of hot and cold, and of any other relatives; is not this true of all of them? Yes. And does not the same principle hold in the sciences? The object of science is knowledge (assuming that to be the true definition), but the object of a particular science is a particular kind of knowledge; I mean, for example, that the science of house-building is a kind of knowledge which is defined and distinguished from other kinds and is therefore termed architecture. Certainly. Because it has a particular quality which no other has? Yes. And it has this particular quality because it has an object of a particular kind; and this is true of the other arts and sciences? Yes. Now, then, if I have made myself clear, you will understand my original meaning in what I said about relatives. My meaning was, that if one term of a relation is taken alone, the other is taken alone; if one term is qualified, the other is also qualified. I do not mean to say that relatives may not be disparate, or that the science of health is healthy, or of disease necessarily diseased, or that the sciences of good and evil are therefore good and evil; but only that, when the term “science” is no longer used absolutely, but has a qualified object which in this case is the nature of health and disease, it becomes defined, and is hence called not merely science, but the science of medicine. I quite understand, and, I think, as you do. 1129