1 Corinthians 12:12-14

Christ is like a single body, which has many parts; it is still one body, even though it is made up of different parts. In the same way, all of us, whether Jews or Gentiles, whether slaves or free, have been baptized into the one body by the same Spirit, and we have all been given the one Spirit to drink. For the body itself is not made up of only one part, but of many parts.