Paul says the church is one body with many parts that have different functions, but they cannot function outside of the body. Not everyone is part of the church; only those who are in Christ, trusting in His righteousness. A Christian cannot exist outside of the body and is to be part of the church. When one member suffers, all suffer, and so we are to be obedient for the sake of the body. What are our gifts? What are we doing in the church and what can we do?