For as the body is one and has many members, but all the members of that one body, being many, are one body, so also [is] Christ. For by one Spirit we were all baptized into one body–whether Jews or Greeks, whether slaves or free–and have all been made to drink into one Spirit. For in fact the body is not one member but many. If the foot should say, “Because I am not a hand, I am not of the body,” is it therefore not of the body? And if the ear should say, “Because I am not an eye, I am not of the body,” is it therefore not of the body? If the whole body [were] an eye, where [would be] the hearing? If the whole [were] hearing, where [would be] the smelling? But now God has set the members, each one of them, in the body just as He pleased. And if they [were] all one member, where [would] the body [be]? But now indeed [there are] many members, yet one body. And the eye cannot say to the hand, “I have no need of you”; nor again the head to the feet, “I have no need of you.” No, much rather, those members of the body which seem to be weaker are necessary. And those [members] of the body which we think to be less honorable, on these we bestow greater honor; and our unpresentable [parts] have greater modesty, but our presentable [parts] have no need. But God composed the body, having given greater honor to that [part] which lacks it, that there should be no schism in the body, but [that] the members should have the same care for one another. And if one member suffers, all the members suffer with [it]; or if one member is honored, all the members rejoice with [it]. Now you are the body of Christ, and members individually. 1 Corinthians 12:12-27
“I do not pray for these alone, but also for those who will believe in Me through their word; that they all may be one, as You, Father, [are] in Me, and I in You; that they also may be one in Us, that the world may believe that You sent Me. And the glory which You gave Me I have given them, that they may be one just as We are one: in them, and You in Me; that they may be made perfect in one, and that the world may know that You have sent Me, and have loved them as You have loved Me. John 17:20-23