We ask ourselves, "Who am I to be brilliant, gorgeous, talented, and fabulous?" Actually, who are you not to be.
You are a child of God; your playing small doesn't serve the world. There is nothing enlightened about shrinking so that other people won't feel insecure around you.
We were born to manifest the glory of God within us. It is not just in some of us, it is in everyone of us, and as we let our own light shine, we unconsciously give other people permission to do the same. As we are liberated from our own fear, our presence automatically liberates others.