Be careful for what you wish for...

Is it possible that the human tendency to chase the (seemingly) impossible/unobtainable is the very pillar by which we define our boundaries?
Is someone who's more persistent more likely to reach their goals? Is it also a question of how "high" you aim - is aiming "high" a way of prematurely defeating yourself or rather stretching the boundaries of reality?

All this assumes, of course, that we are still stuck in our egos and the karmic circle....