Well... things cannot continue for ever. There is an inevitable end to everything. The only positive hope is that everything will work out, or that something great will be accomplished. Sometimes, there is no way to know if things will work out or be ok. There is a point, when one may very well have to just give and move on. When does this point arise? How can one know to stop, if one doesn't know the expected end result? Or what if one tries to accomplish something, but nothing seems to ever be achieved.
It's hard to know when to give up and when to keep going. I almost always keep going beyond the point I should. I keep working or trying even though I know I won't get the right answer ever.