A point of no return is a point in an enterprise, adventure, etc. when participants are too deeply involved or committed to withdraw.
The best way to be too deeply involved into something that you possibly can’t withdraw from is to push harder into that thing until you reach a point of no return.
When you reach a point where giving up will actually cost you more than giving it another go, you have successfully reached a point where you understand how far patience can actually take you.
A point of no return can teach us that giving up, going backwards can deter our capability of exercising patience.