When things go wrong for you, when you think you have given your best and you understand that there is nothing, wrongly, you can do, remember this sentence by T. Edison: 
¨I have not failed. I have just found 10,000 ways that won't work."

So, before you give up on your dreams, before abandoning your goals, think about how many times you can fail and how many more you can learn from these failures.

Make the failure be your favorite teacher who teaches you to become the best version of yourself.