Even as it is written [Ex. 28:16], "Look, I am placing a stone in the city of Zion that people will stumble over and a rock on which they will trip and fall. But the person who believes in Him will not be put to shame [i.e., he will never have unforgiven sin brought up against him]."

For the Scripture says [Isa. 28:16], "Whoever believes in Him [i.e., Christ] will not be put to shame." [i.e., he will never have unforgiven sin brought up against him]

But [Prov. 25:21-25 says], "Feed your enemy if he is hungry; give him something to drink if he is thirsty. For when you do this, it will be [like] heaping burning coals on his head." [i.e., it can cause him burning shame that can lead to his repentance and ultimate forgiveness].