Right when everyone else quits
It's a profound truth and it couldn't be any more true that for most people that fail in life, they mostly quit on the verge of having a huge breakthrough moment. I'm not saying it's 100% the times, but from my own experience, I tend to see it happen.
People usually throw in the towel or stop at a point where it's extremely difficult. Not because they are weak or give up, it simply feels hard for them and emphasis on feels hard. Well in all sincerity, whenever you are otherwise tired of something or someone it often makes perfect sense to stop trying. The downside of this is the number of competitors shrinks from around you. At the very point that others are leaving, complaining or switching to something easier, there's a sarcophagus effect created. When you either have less room because of too much effort made versus too little due to not working as hard.
I have no idea how many times to push on through guarantees a result, that seems almost a perfect world because if we knew how many times a push we needed, we'd know when we're getting closer to achieving our goal. At times by pushing on, there is little to no luck in being able to determine if or when you would ever get anything in return, it also possible to receive your reward much later down the road compared to our original expectation.
This all leads back to the idea we have, that staying the course at a point where the others leave you is now a zone as far as success goes, not as far as motivational videos goes. It's not that hard to understand why that is, there are simply less people left at finish line waiting for same prize you do.
I think to myself now that grinding it out or pushing through is not merely because of higher talent levels of a person, sometimes it's low levels of the sense towards accepting where and when to call it quits. They just do it till it works or die trying to do it.
This man says it perfectly well in this video

https://www.reddit.com/r/enlightenment/comments/1r1t8m1/never_give_up/
This post has been shared on Reddit by @paulinaa through the HivePosh initiative.