“The blood of Jesus Christ His Son cleanses us from all sin” (1 John 1:7).
God said through Moses that without the shedding of blood there is no remission of sin (Leviticus 17:11). That was the Law, and that is why Jesus died for us.
Jesus died on God’s altar, the cross, believed upon by every Christian, trusted by every son and daughter of God who believes in Jesus Christ for their salvation. Jesus was the ultimate sacrifice for sin. He was the ultimate Lamb of God, slain for the remission of our sins. He took the punishment of our sins in His own body on the cross, and that was the last sacrifice of blood for sin as far as God was concerned.
Our salvation is a gift from God (Ephesians 2:8), but it cost Jesus dearly. That was the highest price anybody could have paid for our salvation, and only Jesus could do it. No matter how much you sacrifice and try to pay for salvation by your own works, it’s impossible; the price is too high! God did not spare His own Son, Jesus Christ, but let Him die on the cross so that He could then freely give us all things (Romans 8:32).