The little girl on the stage standing in the bright lights waiting for the recital to begin.
The boy on the wrestling mat facing an unknown opponent.
The adult at the podium addressing the audience.
Stepping on the stage, in the ring, or in front of others can cause butterflies, nervousness, or make you outright scared. But in these situations designed to test your abilities, your enemy is not the people watching. It is not even the opponent standing opposite you.
Who is the enemy? It is the fear within you. In order to succeed when the pressure is on, you must become resistant to that fear. The big stage is an examination of your preparation and training. The work has already been done. Now it is time to show your mastery.
Fear can be healthy. It would be fool hardy to jump with reckless abandon. Therefore, we train in advance and gradually increase our level of testing. Trust your training and learn to master your fear.