Phenomenology of Spirit, Preface, paragraph 18

The living substance is, furthermore, being, which in truth is subject, or, what amounts to the same thing, which in truth is real, only to the degree that the movement of positing itself, or the mediation of becoming-something-else, is with itself. As subject, it is pure and simple negativity, and just on that account the division of the simple; or the counter-posing doubling, which in turn is the negation of this indifferent difference and its opposite: only this self-repairing equality or reflection in itself in being-other – not an original unity as such or immediate as such – is the true. It is the becoming itself, the circle which postulates its end as its goal, and has its end as its beginning, and is only real through implementation and its end.