When the whole body is healthy and growing

“He makes the whole body fit together perfectly. As each part does its own special work, it helps the other parts grow, so that the whole body is healthy and growing and full of love.” (Eph. 4:16 NLT)

The body of Christ consists of one Spirit but many members

“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. For the body does not consist of one member but of many.” (1 Cor. 12:12-14 ESV)

The body of Christ, though many members, have many different functions

“For as in one body we have many members, and the members do not all have the same function, so we, though many, are one body in Christ, and individually members one of another.” (Rom. 12:4-5 ESV)

“Now you are the body of Christ and individually members of it. And God has appointed in the church first apostles, second prophets, third teachers, then miracles, then gifts of healing, helping, administrating, and various kinds of tongues. Are all apostles? Are all prophets? Are all teachers? Do all work miracles? Do all possess gifts of healing? Do all speak with tongues? Do all interpret? But earnestly desire the higher gifts. And I will show you a still more excellent way.” (1 Cor. 12:27-31 ESV)

Christ is the head of the body

“And he is the head of the body, the church. He is the beginning, the firstborn from the dead, that in everything he might be preeminent.” (Col. 1:18 ESV)

“That he worked in Christ when he raised him from the dead and seated him at his right hand in the heavenly places, far above all rule and authority and power and dominion, and above every name that is named, not only in this age but also in the one to come. And he put all things under his feet and gave him as head over all things to the church, which is his body, the fullness of him who fills all in all.” (Eph. 1:20-23 ESV)

Therefore…

“I appeal to you, brothers, by the name of our Lord Jesus Christ, that all of you agree, and that there be no divisions among you, but that you be united in the same mind and the same judgment.” (1 Cor. 1:10 ESV)

“And above all these put on love, which binds everything together in perfect harmony. And let the peace of Christ rule in your hearts, to which indeed you were called in one body. And be thankful. Let the word of Christ dwell in you richly, teaching and admonishing one another in all wisdom, singing psalms and hymns and spiritual songs, with thankfulness in your hearts to God.” (Col. 3:14-16 ESV)