which are the instruments of the organism in its direct relation to the external world. On those through which the life-process returns on itself by virtue of its own subjective principle there is no such impression of uniformity. Such, then, are the leading characteristics of the forms of uniformity and symmetry, and the manner in which they are asserted in the configuration of natural phenomena. _(b) Conformity to Rule_ We now propose to distinguish the more generic conception of conformity to law[247], so far as it appears on a higher plane of organic evolution than that already adverted to, and marks the passage of the same to the freedom of natural no less than spiritual life, from the more abstract forms discussed above. Taken by itself, no doubt, conformity to rule is not alone sufficient to give us the subjective unity and freedom of _totality_; but we do find in the configuration to which it corresponds a totality of essentially _distinguished characteristics_, such as do not merely emerge in _difference_ and opposition, but betray both _unity_ and determinate connection in such totality. A unity thus controlled, albeit still only positively asserted in quantitative substance, is no longer referable to essentially exterior distinctions of mere size numerically ascertainable, but already introduces to our notice a qualitative relation of consistency between these contrasted determinations. In other words we have here neither the abstract repetition of one and the same determinant[248], nor a uniform interchange of similarity and dissimilarity[249], but the contemporaneous association of aspects essentially distinct from one another. We find, in fact, our sense of sight gratified by the association of these distinguishing features in their completeness. And it is the principle of reason which affords us such satisfaction, gratifying our sense only through the totality, or rather through the very totality of differences the nature of the fact requires. Such a connection, however, still remains an unexplained nexus, which sense-perception arrives at partly on account of its persistent repetition, and in part through an intuition of deeper source. A few examples will make clear the process of definition from uniformity to conformity with law. Parallel lines of equal length are abstractly uniform. A further step is taken when we compare geometrical figures of the same form, triangles, for example, but assume their size to be unequal. Here the angles subtended by the corners of each and the relation of line to line is the same, but we find such similarity in different _quanta._ Take again the circle, it does not possess the uniformity of the straight line, but at the same time the determination of abstract equality strictly applies to it, for all its radii are of equal length. The circle is consequently still but a curved line that awakes no particular interest[250].