Some people seem to think of God’s grace as just His willingness to forgive sins, but the truth is, God has always been willing to forgive sins, even before He offered grace as a means of salvation.
For You, Lord, are good, and ready to forgive, And abundant in mercy to all those who call upon You. Psalm 86:5
Under the Law of Moses, God’s commandments were to be strictly obeyed, but God made a provision in the Law for when His people would fail to diligently keep his commands. A priesthood was setup for administering a year-round system of animal sacrifice for the forgiveness of sins.