John·The Father·15 of 34
That they may be one
That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us: that the world may believe that thou hast sent me.
John 17:21 · King James Version
Union is not sameness of opinion. It is the same mutual indwelling that is already true of Father and Son.
An inner reading
The model is given before the request: as thou art in me, and I in thee. Oneness is mutual interiority — each in the other — not the erasing of persons into a crowd. Christ prays this for “them,” which means the pattern of divine life is not a private privilege of one figure. It is the destiny of the many.
The world believes not because it is argued into a conclusion, but because it sees a life that cannot be explained by separation. Metaphysically, division is the illusion that each mind is a closed room. This prayer asks that the rooms be discovered as open to one Life. To consent to it is to stop defending the walls as if they were yourself.