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 RahnerFor it is the bitter grief of theology and its blessed task, too, always to have to seek (because it does not clearly have present to it at the time)...always providing that one has the courage to ask questions, to be dissatisfied, to think with the mind and heart one ACTUALLY has, and not with the mind and heart one is SUPPOSED TO have.
Karl RahnerBut there is yet another form of this hidden heresy, and, paradoxically, it can affect those who are proudest of their long-standing and unimpeachable orthodoxy; heresy in the form of indifference.
Karl Rahner