That's an important statement! Even as God designed the human body; and there are a lot of different parts within the human body. There is a lot of diversity. Every single part in the human body was put in the body with the foreknowledge of God, with thought and concern for the well-being of the whole.
It is the same with the church. God has put every individual within the church—with the well-being of the whole, as well as the well-being of the individual, being a part of His thinking.