From Mark Driscoll and Gerry Breshears (Doctrine, 276):
God has lovingly worked out a way for our friendship with him to be reconciled. Through the cross, Jesus took away our sin so that we could be reconciled to God. Thankfully, God not only graciously takes away our sin, but mercifully extends himself to us, knowing that we desperately need him.
The cross is something done by you. You murdered God incarnate.
The cross is something done for you. God loves you and died to forgive you.