“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.”
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
Original
numquam vacat lascivire districtis, nihilque tam certum est quam otii vitia negotio discuti.
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Seneca the Younger 225
Roman Stoic philosopher, statesman, and dramatist -4–65 BCRelated quotes
Of Time, Work, and Leisure (1962)
Lusty Juventus http://www.umm.maine.edu/faculty/necastro/drama/juventus.txt (1557)

Response to a question by George Carey (a former Archbishop of Canterbury), after the World Economic Forum in Davos, Switzerland (26 January 2003), as to whether the US had given due consideration to the use of "soft power" vs "hard power" against the regime of Saddam Hussein; this has sometimes been portrayed as an accusation by an Archbishop of Canterbury that the United States was engaged in "empire building", in which Powell's response has been paraphrased:
2000s
Context: There is nothing in American experience or in American political life or in our culture that suggests we want to use hard power. But what we have found over the decades is that unless you do have hard power — and here I think you're referring to military power — then sometimes you are faced with situations that you can't deal with.
I mean, it was not soft power that freed Europe. It was hard power. And what followed immediately after hard power? Did the United States ask for dominion over a single nation in Europe? No. Soft power came in the Marshall Plan. Soft power came with American GIs who put their weapons down once the war was over and helped all those nations rebuild. We did the same thing in Japan.
So our record of living our values and letting our values be an inspiration to others I think is clear. And I don't think I have anything to be ashamed of or apologize for with respect to what America has done for the world.
We have gone forth from our shores repeatedly over the last hundred years and we've done this as recently as the last year in Afghanistan and put wonderful young men and women at risk, many of whom have lost their lives, and we have asked for nothing except enough ground to bury them in, and otherwise we have returned home to seek our own, you know, to seek our own lives in peace, to live our own lives in peace. But there comes a time when soft power or talking with evil will not work where, unfortunately, hard power is the only thing that works.

A Hundred and Seventy Chinese Poems (1919), Introduction, p. 18

The TB12 Method (Simon & Schuster, 2017), p. 10 https://books.google.it/books?id=tkk1DwAAQBAJ&pg=PA10.

Rules for the Preservation of Health, 25
Bartlett's Familiar Quotations, 10th ed. (1919)
“Time works so hard for us, if only we can let it.”
Source: The Likeness

“When he is forsaken,
Withered and shaken,
What can an old man do but die?”
Spring it is cheery; reported in Bartlett's Familiar Quotations, 10th ed. (1919).
20th century