Your Most Unhappy Customers Are Your Greatest Source of Learning. Posted 08/11/2017 · Add Comment Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window) Related Posts The Most Ignorant of Folk Are the Easiest to Offend. Your Creator Is Within In Order to Succeed, Your Desire for Success Should Be Greater Than Your Fear of Failure.