How did Jesus indicate that His Church is one?

Mission Lab

Jesus said, “And I have other sheep, that are not of this fold; I must bring them also, and they will heed my voice. So there shall be one flock, one shepherd” (John 10:16).

Jesus prayed to His Father: “That they may all be one; even as thou, Father, art in me, and I in thee, that they also may be in us, so that the world may believe that thou hast sent me” (John 17:21).