Jesus first hinted at the special qualities of his body when the Jews asked him to show them a sign as evidence of his divine power. Jesus responded to the Jews’ request by stating, “’Destroy this temple, and in three days I will raise it up.’ The Jews then said, ‘It has taken forty six years to build this temple, and will you raise it in three days?’ But he was speaking about the temple of his body” (John 2:19-21). Paul elaborated on the connection between the temple and Jesus’ body in his first letter to the Corinthians. Paul talked about the difference between people of the flesh and spiritual people (1 Corinthians 3:1-4) and then, referred to believers as “God’s building” (1 Corinthians 3:9). Paul asked the Corinthian believers, “Do you not know that you are God’s temple and that God’s Spirit dwells in you?” (1 Corinthians 3:16) and went on to say, “Do you not know that your bodies are members of Christ? Shall I then take members of Christ and make them members of a prostitute? Never! Or do you not know that he who is joined to a prostitute becomes one body with her? For, as it is written, ‘The two shall become one flesh.’ But he who is joined in the Lord becomes one spirit with him” (1 Corinthians 6:15-17). Paul used the Greek word kollao (kol-lahˊ-o), which is translated joined, to describe the spiritual union that takes place when a believer is born again. Paul compared this union to sexual intercourse between a man and woman, but indicated that rather than becoming one flesh, the believer becomes one spirit with Christ.

The Greek word kollao means “to join fast together” and refers to a personal attachment that is similar to glue or cement (G2853). In his letter to the Ephesians, Paul compared the relationship between a husband and wife to that of Christ and the church. Paul said:

Wives, submit to your own husbands, as to the Lord. For the husband is the head of the wife even as Christ is the head of the church, his body, and is himself its Savior. Now as the church submits to Christ, so also wives should submit in everything to their husbands.

…In the same way husbands should love their wives as their own bodies. He who loves his wife loves himself. For no one ever hated his own flesh, but nourishes and cherishes it, just as Christ does the church, because we are members of his body. “Therefore a man shall leave his father and mother and hold fast to his wife, and the two shall become one flesh.” This mystery is profound, and I am saying that it refers to Christ and the church. (Ephesians 5:22-32)

The Greek word that is translated hold fast, proskollao (pros-kol-layˊ-o) is a combination of the words pros and kollao. Pros indicates movement toward something or someone “with the dative by the side of, i.e. near to” (G4314), whereas kollao on its own suggests that a physical connection already exists.

Paul indicated that the church, all who are born again, are members of the body of Christ and referred to this doctrinal truth as a profound mystery. What Paul meant by a profound mystery was that being a member of the body of Christ or being able to comprehend what it means to be a member of the body of Christ is too big of an idea for us to comprehend, it is above human insight. Jesus first introduced this idea through his institution of the Lord’s Supper. Matthew’s gospel tells us:

Now as they were eating, Jesus took bread, and after blessing it broke it and gave it to the disciples, and said, “Take, eat; this is my body.” And he took a cup, and when he had given thanks he gave it to them, saying, “Drink of it, all of you, for this is my blood of the covenant, which is poured out for many for the forgiveness of sins. I tell you I will not drink again of this fruit of the vine until that day when I drink it new with you in my Father’s kingdom.” (Matthew 26:26-29)

The Greek word that is translated body in Matthew 26:26 is soma (soˊ-mah), “A noun meaning body, an organized whole made up of parts and members.” It is “spoken of a human body, different from sarx (G4561), flesh, which word denotes the material of the body” (G4983). One way of interpreting Jesus’ statement, “Take, eat; this is my body” (Matthew 26:26) might be let my parts and members become a part of you.

Paul prefaced his discussion of the body of Christ in his letter to the Corinthians with an overview of spiritual gifts. Paul likely connected these two topics because of the dependency of one upon the other. Paul began by stating, “Now concerning spiritual gifts, brothers, I do not want you to be uninformed” (1 Corinthians 12:1). Paul didn’t want the Corinthian believers to ignore the fact that spiritual gifts were linked to the activities of the body of Christ. Paul said:

Now there are varieties of gifts, but the same Spirit; and there are varieties of service, but the same Lord; and there are varieties of activities, but it is the same God who empowers them all in everyone. To each is given the manifestation of the Spirit for the common good. (1 Corinthians 12:4-7)

Paul indicated that gifts were a manifestation or expression of the Holy Spirit and were intended for the common good of the body of Christ. The Greek word sumphero (soom-ferˊ-o), which is translated common good, literally means “to bring together” (G4851); the idea being that the common good is an incentive for membership in the body of Christ. Paul told the Corinthians:

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. (1 Corinthians 12:12-13)

Paul said that we are baptized into one body and made to drink of one Spirit, suggesting that a connection exists between participation in the Lord’s Supper and membership in the body of Christ.

The Greek word that is translated baptized in 1 Corinthians 12:13, baptizo (bap-tidˊ-zo) means “to wash, to cleanse by washing” (G907). John recorded in his gospel that during the Lord’s Supper, “Jesus, knowing that the Father had given all things into his hands, and that he had come from God and was going back to God, rose from supper. He laid aside his outer garments, and taking a towel, tied it around his waist. Then he poured water into a basin and began to wash the disciples’ feet and to wipe them with the towel that was wrapped around him” (John 13:3-5). Jesus told Simon Peter, “What I am doing you do not understand now, but afterward you will understand” (John 13:7). Jesus used two different Greek words that are both translated understand. In reference to not understanding now, Jesus used the word eido (iˊ-do) which has to do with perception (G1492). Whereas, the Greek word ginosko (ghin-oceˊ-ko) has to do with knowing “in a completed sense, that is, to have the knowledge of” (G1097). When Peter responded to Jesus, “’You shall never wash my feet.’ Jesus answered him, ‘If I do not wash you, you have no share with me.’” (John 13:8). “By this statement, ‘If I do not wash you, you have no share with me,’ it seems that the Lord was referring to the necessity of regular spiritual cleansing to remain in fellowship with him. Jesus did not say, ‘you have no share in me (en [1722] emoi), which would indicate Peter lacked salvation, but ‘you have no share with me’ (met’ [3326] emou), meaning Peter would have no communion and fellowship with him. Christians need constant cleansing and renewal if they are to remain in fellowship with God” (note on John 13:8).

Paul elaborated on Jesus’ comment about Peter not having a share with him in his explanation of how the body of Christ functions in a way that is similar to the human body. Paul said:

But our bodies have many parts, and God has put each part just where he wants it. How strange a body would be if it had only one part! Yes, there are many parts, but only one body. The eye can never say to the hand, “I don’t need you.” The head can’t say to the feet, “I don’t need you.”

In fact, some parts of the body that seem weakest and least important are actually the most necessary. And the parts we regard as less honorable are those we clothe with the greatest care. So we carefully protect those parts that should not be seen, while the more honorable parts do not require this special care. So God has put the body together such that extra honor and care are given to those parts that have less dignity. This makes for harmony among the members, so that all the members care for each other. If one part suffers, all the parts suffer with it, and if one part is honored, all the parts are glad.

All of you together are Christ’s body, and each of you is a part of it. (1 Corinthians 12:18-27, NLT)

Paul’s statement, “All of you together are Christ’s body, and each of you is a part of it,” was intended to emphasize the fact that both unity and individuality are necessary for the body of Christ to function properly. One of the keys to understanding how this works can be found in 1 Corinthians 12:24, which contains the statement, “God has so composed the body.” The Greek word that is translated composed, sugkerannumi (soong-ker-anˊ-noo-mee) means “to commingle, i.e. (figurative) to combine or assimilate” (G4786). Assimilation has to do with taking in information, ideas, or culture and understanding them fully. In reference to the body or any biological system, assimilation means to “absorb and digest (food or nutrients)” (Oxford Languages). Therefore, Jesus’ instruction during the Lords’ Supper to, “Take, eat; this is my body” (Matthew 26:26), had the connotation of becoming assimilated into the body of Christ.

Paul talked about unity in the body of Christ in the context of spiritual gifts and maturing as a believer in his letter to the Ephesians. Paul said of Christ:

And he gave the apostles, the prophets, the evangelists, the shepherds and teachers, to equip the saints for the work of ministry, for building up the body of Christ, until we all attain to the unity of the faith and of the knowledge of the Son of God, to mature manhood, to the measure of the stature of the fullness of Christ, so that we may no longer be children, tossed to and fro by the waves and carried about by every wind of doctrine, by human cunning, by craftiness in deceitful schemes. Rather, speaking the truth in love, we are to grow up in every way into him who is the head, into Christ, from whom the whole body, joined and held together by every joint with which it is equipped, when each part is working properly, makes the body grow so that it builds itself up in love. (Ephesians 4:11-16)

Paul noted that the goal of Jesus’ ongoing ministry was building up the body of Christ, and also indicated that when each part was working properly, it made the body grow so that it built itself up in love. Working properly means that each part is active and is doing what it’s designed to do; the body of Christ is efficiently using its resources. In order for that to happen, there can’t be any division or gap in the body’s members. Paul admonished the Corinthians about this early in his letter. Paul stated, “I appeal to you, brothers, by the name of the 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 Corinthians 1:10). The Greek word that Paul used that is translated united is translated perfectly joined together in the King James Version of the Bible. Katartizo (kat-ar-tidˊ-zo) means “to be suitable, such as one should be, deficient in no part” and implies that an adjustment has to be made in order to fit everything together so that it is finished, complete (G2675).

Paul indicated that the parts of the body are joined and held together by Christ, who is the head of the body (Ephesians 4:16). The head describes Christ as being the one to whom others are subordinate. In the context of a building, Jesus was described as being the cornerstone. In relation to architecture, a cornerstone is traditionally the first stone laid for a structure, with all other stones laid in reference. A cornerstone marks the geographical location by orienting a building in a specific direction. It is the rock upon which the weight of the entire structure rests. Jesus referred to himself as the cornerstone after telling his followers The Parable of the Tenants (Matthew 21:33-40). Jesus stated:

But when the tenants saw the son, they said to themselves, ‘This is the heir. Come, let us kill him and have his inheritance.’ And they took him and threw him out of the vineyard and killed him. When therefore the owner of the vineyard comes, what will he do to those tenants?” They said to him, “He will put those wretches to a miserable death and let out the vineyard to other tenants who will give him the fruits in their seasons.”

Jesus said to them, “Have you never read in the Scriptures:

“‘The stone that the builders rejected
    has become the cornerstone;
this was the Lord’s doing,
    and it is marvelous in our eyes’?

Therefore I tell you, the kingdom of God will be taken away from you and given to a people producing its fruits. And the one who falls on this stone will be broken to pieces; and when it falls on anyone, it will crush him.”

When the chief priests and the Pharisees heard his parables, they perceived that he was speaking about them. (Matthew 21:38-45)

Jesus spoke of the cornerstone in a way that was counter intuitive to its intended purpose. Jesus indicated that a person could fall on the cornerstone and said, “When it falls on anyone, it will crush him” (Matthew 21:44). What I believe Jesus meant by this statement with regard to his method of joining and holding together the body of Christ was that those who interfere with or perhaps imitate the building up of the body will be destroyed in the process, as opposed to those who are working properly being strengthened by his support.