If you have made mistakes, even serious mistakes, you may have a fresh start any moment you choose, for this thing we call "failure" is not the falling down, but the staying down.
You will never be a failure if you don't quit. The only way to be a failure is to quit.
How can you tell if you are a failure?
If you had your life to do over again, would you change it?
HAVE YOU CHANGED?
Think about it.