Because you'll never be ready to go after that sale or client you don't think you can handle.
It's only when you act in uncertainty that you truly offer yourself a chance to grow.
The worst that will happen is you wont get the business. The best is that you'll get the business and shoot your confidence through the roof because you just proved you can.
That's what I talk with Jessica Burch, of Bryce Point Insurance, about after she figured how amazing it is.