Now it is easy to say that "eating of the flesh of Christ," is a figurative way of describing faith in Christ. But such a method of dealing with the words of Holy Scripture is really to empty them of their devine force. This spiritual eating, this feeding upon Christ, is the the best result of faith, the highest energy of faith, but it is not faith itself. To eat is to take that into ourselves which we can assimilate as the support of of life. The phrase "to eat the flesh of Christ" expresses therefore, as perhaps no other language could express, the great truth that Christians are made partakers of the human nature of their Lord, which is united in one person to the divine nature, that He imparts to us now, and that we can receive into our own manhood, something of His manhood, which may be the seed, so to speak, of the glorified bodies in which we shall hereafter behold Him. Faith, if I may so express it, in its more general sense, leaves us outside Christ trusting in Him; but the crowning act of faith incorporates us into Christ.
Bishop Westcott, Revelation of the Father.