The longer you hang in there, the greater the chance that something will happen in your favor. No matter how hard it seems, the longer you persist, the more likely your success.

This quote is saying that you should be persistent, no matter how difficult it may feel. You should keep going and not give up, as the longer you try, the more likely it is that something will happen that works out in your favor. In other words, if you stay patient and work hard, you are more likely to be successful in the end.