“The much occupied man has no time for wantonness, and it is an obvious commonplace that the evils of leisure can be shaken off by hard work.”
numquam vacat lascivire districtis, nihilque tam certum est quam otii vitia negotio discuti.
Alternate translation: Nothing is so certain as that the evils of idleness can be shaken off by hard work. (translator unknown).
Source: Epistulae Morales ad Lucilium (Moral Letters to Lucilius), Letter LVI: On quiet and study, Line 9