Self-Worth
You can only accomplish what your self-worth allows you to achieve.
If you don't think you're worth much, you won't accomplish much.
Now, there's a difference between being humble and being arrogant. There is a lot of self-evaluation, self-awareness, and realizing, "I'm worth a lot. I can achieve a lot."
So much about being 'worth a lot' is understanding you're a person of value that has value to add to other people, that are people of value.
And that's the big difference between thinking a lot of yourself and not thinking of others.
When you think about others and think enough about yourself to appreciate who you are, what value you have, and then you can make a real difference.
Through that, what you know about yourself and you appreciate yourself, and you believe you are a 10 out of 10, you can serve people 10 out of 10.
If you only believe you're a two or three out of 10, then you're only going to be able to serve people at a two or three out of 10.
Know your self-worth.
That's what's going to allow you to achieve.