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 Rahner
Reinterpreting Rahner: A Critical Study of His Major Themes
, Fordham University Press, New York, pp.322
Karl Rahner addresses Christianity on the Threshold of the Third Millennium
From an interview with a Swiss Magazine
Karl Rahner on What It Means To Be A Priest Today