On the passion and death of the Lord:
"...the exterior act of being crucified is accompanied by an interior act of self-giving (the Body is 'given for you'). 'No one takes [my life] from me,' says the Lord... This act of giving is in no way just a spiritual occurrence. It is a spiritual act that takes up the bodily into itself, that embraces the whole man; indeed, it is at the same time an act of the Son."
(Ratzinger, The Spirit of the Liturgy)