[my] Father are one.
Our Lord's own explanation and illustration of the manner in which he and the Father are one is very generally overlooked. He said in prayer to the Father–
"I pray not for the world but for them which thou hast given me, for they are thine…neither pray I for these alone, but for them also which believe on me through their word; 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 they may be ONE, even as we are ONE: I in them and thou in me, that they may be MADE PERFECT IN ONE." John 17:9,20-23
Here the oneness of the Church, for which the Lord prayed, is specially stated to be exactly the same as the oneness between the Father and the Son. That the oneness of the Church is oneness of mind and not a personal oneness needs no discussion. Evidently the thought in the Redeemer's mind was oneness of heart, oneness of purpose, oneness of will, amongst his followers; and that oneness identical with the oneness between the Father and himself. And this oneness was to be attained on the part of the Church in the same manner exactly as the oneness between the Father and the Son was attained. The Son was at one with the Father because he fully accepted as his own the Father's will, saying, "Not my will but thine be done." So each member of the Church is to come into perfect harmony with the Father, and with the Son, by doing not their own wills, but by setting aside their own wills and accepting the will of Christ, which is the will of the Father. Thus, and thus only, will the Church ever come into the oneness for which our Lord here prayed, and which he refers to as of the same kind as the oneness between the Father and himself. How beautiful and reasonable is the Scriptural oneness of the spirit of the Father and Son and Church.