Have I delivered service of the best possible quality of which I was capable or could I have improve...

Have I delivered service of the best possible quality of which I was capable or could I have improved any part of this service?

Napoleon Hill

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2017 November 03	Origin: Facebook post Link: https://www.facebook.com/NapoleonHillFoundation/photos/a.10150592813732138.407183.152231392137/10153893550092138/?type=3&theater	Image evidence

American author

October 26th, 1883 - November 8th, 1970