Many of life's failures are people who did not realize how close they were to success when they gave up.
~ Thomas Edison
On the other hand, many of life's successes are people who realized that failing was just as pleasurable as succeeding, & mediocrity was plenty good enough. Who didn't beat their heads against a wall & still couldn't pull off whatever grand plan they had in mind. Success can be being OK with what you've got not striving after more.