When the world say "give up", there will always be someone tell you "give it one more time"...but is that really a good idea?
Know when to stop, give up and move on.
Sometime we have to stop and except that we have been defeated. In order to learn and move on.
In a business world, there are many article about "know when to quit" because life isn't always going in the direction that we want it to go. And when it get to the point that you are in a dilemma, weather you should quit or you should push forward. It's only a matter of few things like... Example from entrepreneur.com