This would bring on the counter-question whether Eternity is presented to us as Repose in the general sense or as the Repose that envelops the Intellectual Essence.
On the first supposition we can no more talk of Repose being eternal than of Eternity being eternal: to be eternal is to participate in an outside thing, Eternity.
Further, if Eternity is Repose, what becomes of Eternal Movement, which, by this identification, would become a thing of Repose?
Again, the conception of Repose scarcely seems to include that of perpetuity — I am speaking of course not of perpetuity in the time-order (which might follow on absence of movement) but of that which we have in mind when we speak of Eternity.
If, on the other hand, Eternity is identified with the Repose of the divine Essence, all species outside of the divine are put outside of Eternity.
Besides, the conception of Eternity requires not merely Repose but also unity — and, in order to keep it distinct from Time, a unity including interval — but neither that unity nor that absence of interval enters into the conception of Repose as such.
Lastly, this unchangeable Repose in unity is a predicate asserted of Eternity, which, therefore, is not itself Repose, the absolute, but a participant in Repose.