Successful people just don't let failure define them or keep them from doing what they want to do. For example, I'd have people come up to me after my shows, and they'd say they want to do stand-up but are scared they're going to fail. I'd tell them, "You are going to fail, and anyone who is success has powered through many, many failures."
When I was young I thought, 'Yeah, people don't see, they're not recognizing how funny I am, and how talented I am'. And the guys that mentored me were like, 'You just have to keep getting up'. And I look back and they were right. They were all right.