This is a simple relationship to number-determinations. Aristotle instances (De anim. I. 3) one more intricate from Timæus: “The soul moves itself, and hence also the body because it is bound up with body; it consists of elements and is divided according to harmonic numbers, and hence it has feeling and an immediately indwelling (_σύμφυτον_) harmony. In order that the whole may have an harmonious movement, Timæus has bent the straight line of harmony (_εὐθυωρίαν_) into a circle, and again divided off from the whole circle two circles, which are doubly connected; and the one of these circles is again divided into seven circles, so that the movements of the soul may resemble those of the heavens.” The more definite significance of these ideas Aristotle unfortunately has not given; they contain a profound knowledge of the harmony of the whole, but yet they are forms which themselves remain dark, because they are clumsy and unsuitable. There is always a forcible turning and twisting, a struggle with the material part of the representation, as there is in mythical and distorted forms: nothing has the pliability of thought but thought itself. It is remarkable that the Pythagoreans have grasped the soul as a system which is a counterpart of the system of the heavens. In Plato’s Timæus this same idea is more definitely brought forward. Plato also gives further number-relations, but not their significance as well; even to the present day no one has been able to make any particular sense out of them. An arrangement of numbers such as this is easy, but to give to it a real significance is difficult, and, when done, it always must be arbitrary.