Letter 59:
Hence whosoever confesses not the human body in Christ, must know that he is unworthy of the mystery of the Incarnation, and has no share in that sacred union of which the Apostle speaks, saying, "For we are His members, of His flesh and of His bones. For this cause a man shall leave father and mother and shall cleave to his wife, and there shall be two in one flesh. " And explaining what was meant by this, he added, "This mystery is great, but I speak in respect of Christ and the Church." Therefore, from the very commencement of the human race, Christ is announced to all men as coming in the flesh. In which, as was said, "there shall be two in one flesh," there are undoubtedly two, God and man, Christ and the Church, which issued from the Bridegroom's flesh, when it received the mystery of redemption and regeneration, water and blood flowing from the side of the Crucified. For the very condition of a new creature which at baptism puts off not the covering of true flesh but the taint of the old condemnation, is this, that a man is made the body of Christ, because Christ also is the body of a man.
Letter 108:
The manifold mercy of God so assists men when they fall, that not only by the grace of baptism but also by the remedy of penitence is the hope of eternal life revived, in order that they who have violated the gifts of the second birth, condemning themselves by their own judgment, may attain to remission of their crimes, the provisions of the Divine Goodness having so ordained that God's indulgence cannot be obtained without the supplications of priests. For the Mediator between God and men, the Man Christ Jesus, has transmitted this power to those that are set over the Church that they should both grant a course of penitence to those who confess, and, when they are cleansed by wholesome correction admit them through the door of reconciliation to communion in the sacraments. In which work assuredly the Saviour Himself unceasingly takes part and is never absent from those things, the carrying out of which He has committed to His ministers, saying: "Lo, I am with you all the days even to the completion of the age :" so that whatever is accomplished through our service in due order and with satisfactory results we doubt not to have been vouchsafed through the Holy Spirit.
