In the old testament, there were different types of sacrifices ( sin, peace, guilt and burnt offerings) made to God with the blood of an animal. But God did a new thing when he sent hs son Jesus Christ, the sacrifice suitable to save man to save the world. John 3:16-17, Heb 9: & Heb 10:, Rom 3:23, Ps 40:6-8, Eph 1:7, Lev 4:27 & Lev16: 11, 15 (the book of Leviticus)
