What Christ gives us is quite explicit if his own words are interpreted according to their Aramaic meaning. The expression 'This is my Body' means this is myself.
Karl RahnerMeditating on the nature and dignity of prayer can cause saying at least one thing to God: Lord, teach us to pray!
Karl RahnerOnly in love can I find you, my God. In love the gates of my soul spring open, allowing me to breathe a new air of freedom and forget my own petty self. In love my whole being streams forth out of the rigid confines of narrowness and anxious self-assertion, which make me a prisoner of my own poverty emptiness. In love all the powers of my soul flow out toward you, wanting never more to return, but to lose themselves completely in you, since by your love you are the inmost center of my heart, closer to me than I am to myself.
Karl Rahner