Challenges with a new belief

I have been working with my weekly coaching calls on my beliefs. One huge belief that has been embedded in my value system for many years is, “you must work hard to achieve things so you will be accomplished.” I have always set goals to achieve things that are outside of myself. Unfortunately, I find myself feeling empty when I achieve something because my thought patterns are constantly around never having enough.

I have decided on a new belief with my coach which I feel is quite abstract. “Everything I want is already inside of me.” I feel a sense of control when I think this but I am not really sure what it means. I am used to seeing something I want and taking tangible steps to get it. If I pull from inside of me to get what I want, what exactly am I pulling out?

Not sure if this makes sense but I would love to get a coach’s thoughts.