We have many parts in one body, but the parts don’t all have the same function.
For as we have many members in one body, and all members have not the same office:
For as in one physical body we have many parts (organs, members) and all of these parts do not have the same function or use,
For even as we have many members in one body, and all the members have not the same office:
For just as, within one body, we have many parts, though all the parts do not have the same role,