Wash yourselves, make yourselves clean;
Remove the evil of your deeds from My sight.
Cease to do evil, (Isaiah 1:16 NASB)
In this verse God gives his cure for their problem: stop doing evil! This verse commands them to “make yourselves clean.” This does NOT mean that they are able to save themselves by their own works. Rather, it teaches that they are to repent and offer genuine sacrifice, and GOD will actually make them clean. Those who are familiar with the Torah will realize that the Old Testament Law does not teach people how to make themselves righteous. Rather, they rely on God’s mercy and forgiveness to make them clean once they have turned to Him. The Torah tells them how to reveal their sincerity of heart through their sacrifices, and God then forgives them of their sins. They are never forgiven by reason of achieving righteousness on their own. This is why the “mercy seat” is aptly named (Exodus 25:19, Leviticus 16:2)