You can become an even more excellent person by constantly setting higher and higher standards for yourself and then by doing everything possible to live up to those standards.
Pain is temporary. It may last a minute, or an hour, or a day, or a year, but eventually it will subside and something else will take its place. If I quit, however, it lasts forever.
I'm not afraid to take a step and if I fall, I fall. I pick myself up and move on. If we can all learn one thing in life, it's don't be afraid to take on something that you believe you're capable of achieving.