“Christ Himself has said: “They are no longer two, but they are one flesh” (Matt. 19:6). Is it strange then, if they are one flesh, that they should have one tongue and should say the same words, since they are one flesh, Head and body? Let us therefore hear them as one. But let us listen to the Head speaking as Head, and to the body speaking as the body. We do not separate the two realities, but two different dignities; for the Head saves, and the body is saved.”

Reflections on Various Subjects (1665–1678), VII. On Air and Manner

Source: On the Mystical Body of Christ, p.428

Source: On the Mystical Body of Christ, p. 419
Context: In order to understand the Scriptures, it is absolutely necessary to know the whole, complete Christ, that is, Head and members. For sometimes Christ speaks in the name of the Head alone … sometimes in the name of His body, which is the holy Church spread over the entire earth. And we are in His body … and we hear ourselves speaking in it, for the Apostle tells us: “We are members of His body” (Eph. 5:30). In many places does the Apostle tell us this.

Ps. 30:19
Source: On the Mystical Body of Christ, p.425

"Ulysses," lines 16–20, from Poems 1930-1933 (1933).
Poems

The Head is the only begotten Son of God, the body is His Church; the bridegroom and the bride, two in one flesh. All who dissent from the Scriptures concerning Christ, although they may be found in all places in which the Church is found, are not in the Church; and again all those who agree with the Scriptures concerning the Head, and do not communicate in the unity of the Church, are not in the Church
Encyclical letter of Pope Leo XIII on the Unity of the Church, June 29, 1896, ch. 16, Publications of the Catholic Truth Society, 1896, London, Volume 30, p. 41. http://books.google.com/books?id=pYcQAAAAIAAJ&pg=PA41&dq=%22Head+and+the+body+are+Christ+wholly+and+entirely%22&hl=en&ei=6JVRToOwCYbKsQKKxvTHBg&sa=X&oi=book_result&ct=result&resnum=2&ved=0CC8Q6AEwAQ#v=onepage&q=%22Head%20and%20the%20body%20are%20Christ%20wholly%20and%20entirely%22&f=false
Alternate translation: The whole Christ is Head and Body. The Head, the only begotten Son of God; and His Body, the Church: the Bridegroom and the Bride, two in one flesh. Whosoever dissent from the Holy Scriptures in respect of the Head, even though they be found in all the places in which the Church is marked out to be, are not in the Church. And again, whosoever agree with the Holy Scriptures concerning the Head, and do not communicate with the unity of the Body, are not in the Church, because they dissent from Christ's own witness concerning Christ's Body, which is the Church.
Dr. Pusey, and the Ancient Church (1866), by Thomas W. Allies, Longmans, Green, London, p. 82 http://books.google.com/books?id=Cn-pxLKAcRIC&pg=PA82&dq=%22whole+Christ+is+Head+and+Body.+The+Head,+the+only-begotten+Son+of+God%22&hl=en&ei=gZZRTpHKDqmusQKQ8cnnBg&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCoQ6AEwAA#v=onepage&q=%22whole%20Christ%20is%20Head%20and%20Body.%20The%20Head%2C%20the%20only-begotten%20Son%20of%20God%22&f=false
De Unitate Ecclesiae - On the Unity of the Church (c. 401 – 405)

Source: The Gospel of Sri Ramakrishna (1942), p. 319
Context: The body was born and it will die. But for the soul there is no death. It is like the betel-nut. When the nut is ripe it does not stick to the shell. But when it is green it is difficult to separate it from the shell. After realizing God, one does not identify oneself any more with the body. Then one knows that body and soul are two different things.

Sonnet XXXIV
Sonnets (1844)

Source: On the Mystical Body of Christ, p.422