The shedding of animal blood was, indeed, provided by God as a temporary covering for the people’s sins until Christ’s blood took them all away.  However, the actual act of sacrifice wasn’t what saved a person, but the faith in the Messiah it pointed to. It’s like how we get baptized and do good because we are saved, not in order to be saved.

Well, that was wordy, but necessary.  Speaking of words, or numbers, how many chapters are in the book of Leviticus?