a little theology

aye. Theology can be difficult for me to grasp.
What does Jesus's dying on the cross have to do with our salvation?
What is our relationship to "the Law" -- what is the law to us? (I get this one!)
What is the sacrifice of the Eucharist?

question and answer session recording here (starts at 26:00, but there is a nice story about a kitten at 18:27)

See if your answer matches Dr. Scott Hahn's.

I'm still trying to wrap my mind around it.