You have refused sacrifice and oblation,
but you have opened your ears to me.
You have refused burnt-offerings, even for sin –
so I said “I am coming.
The books of scripture have written of me.
It is your will, my God, that I wish to perform:
your law is next to my heart.”
From Psalm 40
(Please imagine a lovely music video of the St. Louis Jesuits "Here I Am, Lord"--will try to link later but my work computer speaker isn't working so I don't want to get a clunker!)