en: Paul-Valéry said that even Sisyphus, in rolling his stone, was not working in vain since he was flexing his muscles.
el: Ο Paul Valery έλεγε ότι ακόμη και ο Σίσυφος, όταν κυλούσε το βράχο του, δεν έκανε άσκοπη εργασία, εφόσον γύμναζε τους μύς του.