https://www.journals.uchicago.edu/doi/pdfplus/10.1086/475275
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Edited to correct attribution error.
Perhaps what is more productive is: live your days so that when you think back on them (let’s say at a time horizon of months), you feel satisfied in what you’ve done and how you’ve grown.
Problem with this statement is that what matters after someone does really doesn’t matter to that person after only before, also, on a long enough time span nothing will matter after. Does what most people did 3000 years ago matter? 10000? A million? I wouldn’t chase legacies
A better 'problem' to point out might be the timespan over which few legacies that are remembered originate. 'I want to be the Tutankhamen of my time' is all very well, but there's no reason to think there will even be one.
Their names were Fritz Haber and Carl Bosch.
As someone who put in the effort for many of these things and is now reaping the reward, I am certainly glad my past self got me here.
Sure, a little misfortune could have led me to a drastically different state today.
But as the saying goes:
> God grant me the Serenity to accept the things I cannot change, Courage to change the things I can, and Wisdom to know the difference.
God was added there, in a very convenient rephrasing, as if to switch the responsibility from oneself (the core of Epictetus' stoicism, what he was talking about), to God.
Whatever you go out & gather, is ultimately worthless. So if you're in a shit mood & thinking that some day this work will pay off, you'll find that your days are spent in a shit mood & thinking some day this work will pay off. & then you die & everything you did doesn't really matter, & you spent your time in a shit mood. So if instead you find enjoyment in the simple daily toll, that your work today is essentially paying for the food you'll enjoy today, then you'll find your days are spent in a good mood. & then you die & everything you did doesn't really matter, but at least you enjoyed your time while it lasted
So "live it like your last" is a bit hyperbolic, but at least don't justify your suffering on the idea that life gets better
To try make sense of "live it like your last", it might be better said as "go to sleep at peace with your life even if you were to die in the night"