Plato further shows us the nature of the Idea in one of the most famous and profound of passages, where in the essence of the soul he recognizes again the very same idea that he also expressed as the essence of the corporeal. For he says: “The soul is created in the following way: Of the indivisible and unchangeable and also of the divisible which is corporeal, God made a third kind of intermediate essence, which partook of the nature of the same and of the nature of the other or diverse.” (The divisible is to Plato likewise the other as such, or in itself, and not of anything else.) “And God in like manner made the soul a sort of intermediate between the indivisible and the divisible.” Here the abstract determinations of the one which is identity, of the many or non-identical, which is opposition and difference, once more appear. If we say: “God, the Absolute, is the identity of the identical and non-identical,” a cry is raised of barbarism and scholasticism. Those who speak of it so still hold Plato in high esteem, and yet it was thus that he determined the truth. “And taking these three elements as separate, God mingled them all into one Idea, because he forcibly compressed the incongruous nature of the other into the same.”[51] This is undoubtedly the power of the Notion, which posits the many, the separate, as the ideal, and that is also the force applied to the understanding when anything is placed before it. Plato now describes how the self-identical, as itself a moment, and the other or matter, and the third, the apparently dissoluble union which has not returned into the first unity—which three were originally separated—have now, in simple reflection into self and resumption of that beginning, been degraded into moments. “Mingling the identical and the other with the essence (οὐσία),” the third moment, “and making them all one, God again divided this whole into as many parts was as fitting.”[52] Since this substance of the soul is identical with that of the visible world, the one whole is for the first time the now systematized substance, the true matter, the absolute element which is internally divided, an enduring and unseparable unity of the one and many; and no other essence must be demanded. The manner and mode of the division of this subjectivity contain the famous Platonic numbers, which doubtless originally pertain to the Pythagoreans, and respecting which both ancients and moderns, and even Kepler himself in his _Harmonia mundi_, have taken much pains, but which no one has properly understood. To understand would mean two things, and in the first place, the recognition of their speculative significance, their Notion. But, as already remarked of the Pythagoreans (Vol. I. p. 224), these distinctions of number give only an indefinite conception of difference, and that only in the earlier numbers; where the relationships become more complicated, they are quite incapable of designating them more closely.