Note 25 — THE JOURNAL OF SPECULATIVE PHILOSOPHY. Vol. I. 1867. No. 4.
Reading edition
The first postulate of natural science is an antithesis in the pure identity of Nature. This antithesis must be thought quite purely, and not with any other substrate besides that of activity; for it is the condition of all substrate. The person who cannot think activity or opposition without a substrate, cannot philosophize at all. For all philosophizing goes only to the deduction of a substrate.