Take a lyre player: he’s relaxed when he performs alone, but put him in front of…

Take a lyre player: he’s relaxed when he performs alone, but put him in front of an audience, and it’s a different story, no matter how beautiful his voice or how well he plays the instrument. Why? Because he not only wants to perform well, he wants to be well received — and the latter lies outside his control.
– Epictetus, Enchiridion