This Word of God was made flesh and dwelt among us. He had no power of himself to die for us: he had to take from us our mortal flesh. This was the way in which, though immortal, he was able to die; the way in which he chose to give life to mortal men: he would first share with us, and then enable us to share with him. Of ourselves we had no power to live, nor did he of himself have the power to die.
In other words, he performed the most wonderful exchange with us. Through us, he died; through him, we shall live.
The death of the Lord our God should not be a cause of shame for us; rather, it should be our greatest hope, our greatest glory. In taking upon himself the death that he found in us, he has most faithfully promised to give us life in him, such as we cannot have of ourselves.
From a sermon by St. Augustine, Office of Readings, Monday of Holy Week