Don't quit don't give up. You can accomplish anything you set your mind to. Any goal you have go full force !! And never say I'm not good enough I can't do it it's impossible .. say I'm possible I can do this and I am good enough.
Do what you love to do and give it your very best. Whether it's business or baseball, or the theater, or any field. If you don't love what you're doing and you can't give it your best, get out of it. Life is too short. You'll be old before you know it.