There's the right way to feel self-important and the wrong way to feel so. To feel the right way, realize that you serve God to help save souls, and that's an important position. You are to be a shining light in the world. To remain fit in serve, it's imperative that you maintain your grow in holiness so that you'll be able to do the greatest possible good for the glory of God. You are now indispensable to God ~ that's how important you are!