This quote came in an email from Loome Theological Booksellers. It is from Romano Guardini, who more often than not challenges me. The book is titled "The Last Things".

“The central position of man in Christianity confers on the Sacraments, especially on the Eucharist, a meaning wholly new. What did Christ mean when He said, ‘He that eateth my flesh and drinketh my blood hath everlasting life, and I will raise him up on the last day’? (John 6:55). Why did He not say, He that attaches his spirit to My spirit, who undertakes to do My will? Because what matters is not ‘spirit,’ but the living, human-divine reality of Christ, which has its point of decision precisely in that which any spiritualizing tendency first relinquishes – namely, the body, or, in the precise language of St. John, ‘the flesh.’ Because in man it is the living whole that matters, not the soul. The point of decision is the physical act of ‘eating’ and ‘drinking,’ in contrast to any attempts at vaporizing this solid reality. The fruit of this sacred ‘eating’ and ‘drinking’ is the resurrection on the last day. Truly a ‘hard’ saying, for it involves the end and purpose of the Christian life. The doctrine of the Eucharist is guaranteed by the doctrine of the resurrection”.

I think I'll have to chew on this for a while.