"Because the people God uses don't have to know a lot of things, or have a lot of things - they just have to need him a lot."
from Let's Go, a story about when Jesus chooses his helpers, from the Jesus Storybook Bible
We are called to willingly give up our rights and welcome the sacrifices that accompany being a servant to others. We are not called to think badly of ourselves. People who think badly of themselves are as self-centered as those who think highly of themselves. Instead, we are called not to think of ourselves at all. As our grasp on our perceived rights weakens, our needs fade into the background, and we become little images of Christ - consumed with the needs of others to the forgetfulness of our own.