[p. 436]
|436| connection and necessity and thereby itself be completely freed, – whereby alone it is also possible to cognise the limits of science, about which without this it must remain in ignorance, because otherwise it would have to stand above itself and cognise the nature of its principle according to its determinacy in the absolute form; for from this cognition there would follow for it immediately the cognition and certainty of the extent of the equality of its various determinacies. As it is, however, it can relate to its limits only empirically and must now make false attempts to overstep them, now think them narrower than they are, and therefore experience wholly unexpected extensions, as geometry likewise – which, for example, knows how to prove the incommensurability of the diameter and the side of the square, but not that of the diameter and the periphery of a circle1) -, still more arithmetic, and most of all the union of the two, gives the greatest examples of the groping of science in the dark at the limits.
1) Hegel’s footnote. Fichte prides himself (in the introduction to his work on natural right [Grundlage des Naturrechts nach Prinzipien der Wissenschaftslehre, Leipzig und Jena 1796/97; SW, Bd. III]) on the simplicity of his insight into the ground of the latter incommensurability: the curved, namely, is in earnest not straight. The superficiality of this ground is evident of itself and is also immediately refuted by the first incommensurability, that of the diameter and the side of the square, both of which are straight, as well as by the quadrature of the parabola. As for the help which is sought in the same place, in healthy common sense, against mathematical infinity, namely that a polygon of infinitely many sides, precisely because it is a polygon of infinitely many sides, cannot be measured, then partly the very same help would have to be available against the infinite progress in which the absolute Idea is supposed to realise itself, and partly nothing is thereby determined about the main point, the positive infinity, which is not an infinite multitude but identity, as to whether this is to be posited, which means as much as that nothing is determined about commensurability or incommensurability.
If the critical philosophy has had the important negative effect upon theoretical sciences of demonstrating that the scientific element

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