Try and try and try until you succeed

When every possibility ends one another alternative window opens, every alternative window shows a new path, each new path gives you the confidence to solve the problem in a different way, so keep trying, stop not, if you keep trying one day you definitely you will succeed but if you don't try you will never succeed.

This quality trying again and again, we can notice in kids they just keep on trying just for example how they learned to walk they never give up because they don't have fear of failure.

Remember the great Thomas Alva Edison story how many times he failed before his invention.