Belief is powerful. But it has to be earned.

Others believe in you when you are consistent in acing a goal they expect, or you challenge yourself to meet. You make them believe in you when you give your word of honor that you will accomplish something.

You believe in yourself with every success and after reassessing every failure to never-do-that-again. You demonstrate capability and professionalism in words, gestures, and actions.

Exude belief.

Demonstrate and over-achieve a skill, smash a goal, stare down a deadline, work well within a budgetary constraint. Let them see you and they will show how they believe in you: refer, hire, recommend you.

Beliefs run two ways.