Do you think working hard pays off or not working too much works better?

I always try to work hard but then.. some say curb your enthusiasm. I think it make sense. I haven't received anything by working hard. I rather get something by not working hard better. I mean.. working hard is a myth. Don't you think?

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3 mo
Working hard is easy and not working hard is hard, and not working at all is the hardest thing
Do you think working hard pays off or not working too much works better?
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