G-d prefers righteousness to sacrifices - Key Passages
G-d hates the sacrifices of the wicked person and their sacrifices are not pleasing to G-d. Most important teaching is that a wicked person cannot get his sins atoned for by bringing a sacrifice. He needs to first repent and with a pure and clean heart can bring a sacrifice to G-d to show that he has turned away from him evil ways. There is no sacrifice for a willful sin except that the person repent from his evil ways and return to G-d with a penitent heart and G-d will forgive the person. The Sin sacrifice is only for unintentional sins. Also important to understand that a righteous person cannot die for the sins of a wicked person. Isaiah 1:11 Of what use are your many sacrifices to Me? says the Lord. I am sated with the burnt-offerings of rams and the fat of fattened cattle; and the blood of bulls and sheep and he goats I do not want. 12 When you come to appear before Me, who requested this of you, to trample My courts? 13 You shall no longer bring vain meal-offerings, it is smoke...