Bruce Springsteen said this quote

Don’t take yourself too seriously. Take yourself as seriously as death itself. Don’t worry. Worry your ass off. Have iron-clad confidence, but doubt. It keeps you alive and alert! Believe you are the baddest ass in town – and [that] you suck! It keeps you honest. Be able to keep two completely contradictory ideas alive and well inside of your heart and head at all times. If it doesn’t drive you crazy, it will make you strong. And when you walk on stage tonight to bring the noise, treat it like it’s all we have – and then remember it’s only rock’ n’ roll.