What is Church?
John 17:9,11,18,20-23(NIV)  I pray for them. I am not praying for the world, but for those you have given me, for they are yours…  I will remain in the world no longer, but they are still in the world, and I am coming to you. Holy Father, protect them by the power of your name, the name you gave me, so that they may be one as we are one...  As you sent me into the world, I have sent them into the world…  “My prayer is not for them alone. I pray also for those who will believe in me through their message,  that all of them may be one, Father, just as you are in me and I am in you…  I have given them the glory that you gave me, that they may be one as we are one—  I in them and you in me—so that they may be brought to complete unity. Then the world will know that you sent me and have loved them even as you have loved me.
▪The key to unity is humility.