We´ve been created to glorify God!
If you had a polluted garment on even a brand new garment, what would you feel like? I am sure you would feel disgusted. This is exactly what those who try to please God through their good works without Christ feel. It doesn´t matter how many good works you do, God would never accept you unless you accept Jesus by faith. God´s peace enters your heart because you get to know Jesus and realise that in Him you are saved and accepted by God.