Some find activity only in repose, and others repose only in movement.

[Les uns ne peuvent trouver d’activité que dans le repos, el les autres de repos que dans le mouvement.]

Joseph Joubert (1754-1824) French moralist, philosopher, essayist, poet
Pensées [Thoughts], ch. 4 “De la Nature des Esprits [On the Nature of Minds]” ¶ 19 (1850 ed.) [tr. Calvert (1866)]
    (Source)

(Source (French)). Alternate translation:

There are some who can only find activity in repose, and others who can only find repose in movement.
[tr. Lyttelton (1899), ch. 2, ¶ 11]