They all started out by saying something like this: "I'm afraid I'll let my family down if I don't get my doctorate," or "My committee won't accept my dissertation no matter how many times I revise."
By the end, each of them ROCKED their dissertation defense. They skipped their way across the graduation stage.
If you can learn the unspoken rules of the dissertation process and give your committee what they want, you can get your dissertation accepted.