For just as the body is one and has many members, and all the members of the body, though many, are one body, so it is with Christ. For in one Spirit we were all baptized into one body—Jews or Greeks, slaves or free—and all were made to drink of one Spirit.
1 Corinthians 12:12-13
Have you ever wished your tongue was on the bottom of your foot? Or that your hands and ears were switched? Probably not. Our bodies are designed by God so that each part is in the place it needs to be, performing it's specific function.
If you are a Christian then you are part of the body that is the church. God has placed you where He wants you and calls you to a purpose. Each one of you has unique gifts and circumstances that allow you to contribute to God's Kingdom in a way that is different from your friends and family.
Your lungs can't digest food, but that doesn't make them less important than your stomach. In the same way, you are not more or less important than someone else because of the role you fill.
You also can't operate without other people. Just like your tongue can't do it's job without the rest of your mouth: it takes all of us, working together to accomplish God's purpose.