You have to create your self-belief by going to your core to find the probable reasons for the negativity in you, and then demolish them.
The only test is what you see when you look in a mirror.
Act like a champion, and then become one.
Too often, people get stuck in a state of over-thinking, the result is that they never reach a decision.
Mix with positive-minded people as a means to tap into your unexploited potential.
Success is virulent. Once you get the bug then it's in you.