Quantity, as we have seen, is not only capable of alteration, _i.e._ of increase or diminution: it is naturally and necessarily a tendency to exceed itself. This tendency is maintained even in measure. But if the quantity present in measure exceeds a certain limit, the quality corresponding to it is also put in abeyance. This however is not a negation of quality altogether, but only of this definite quality, the place of which is at once occupied by another. This process of measure, which appears alternately as a mere change in quantity, and then as a sudden revulsion of quantity into quality, may be envisaged under the figure of a nodal (knotted) line. Such lines we find in Nature under a variety of forms. We have already referred to the qualitatively different states of aggregation water exhibits under increase or diminution of temperature. The same phenomenon is presented by the different degrees in the oxidation of metals. Even the difference of musical notes may be regarded as an example of what takes place in the process of measure,--the revulsion from what is at first merely quantitative into qualitative alteration. 110.] What really takes place here is that the immediacy, which still attaches to measure as such, is set aside. In measure, at first, quality and quantity itself are immediate, and measure is only their 'relative' identity. But measure shows itself absorbed and superseded in the measureless: yet the measureless, although it be the negation of measure, is itself a unity of quantity and quality. Thus in the measureless the measure is still seen to meet only with itself. 111.] Instead of the more abstract factors, Being and Nothing, some and other, &c., the Infinite, which is affirmation as a negation of negation, now finds its factors in quality and quantity. These (α) have in the first place passed over, quality into quantity, (§ 98), and quantity into quality (§ 105), and thus are both shown up as negations, (ß) But in their unity, that is, in measure, they are originally distinct, and the one is only through the instrumentality of the other. And (γ) after the immediacy of this unity has turned out to be self-annulling, the unity is explicitly put as what it implicitly is, simple relation-to-self, which contains in it being and all its forms absorbed.--Being or immediacy, which by the negation of itself is a mediation with self and a reference to self,--which consequently is also a mediation which cancels itself into reference-to-self, or immediacy,--is Essence.