His answer

But has our Lord been wanting on his part? Has he not guarded us enough against this pleasing delusion? Has he not armed us here with armor of proof against Satan transformed into an angel of light (2 Corinthians 11:14)? Yes, truly. He here defends, in the clearest and strongest manner, the active, patient religion he had just described. What can be fuller and plainer than the words he immediately adds to what he had said of doing and suffering? You are the salt of the earth (Matthew 5:13). But if the salt has lost its savor, with what shall it be salted? It is from then on good for nothing, but to be cast out and trodden under foot by people. Matthew 5:13. You are the light of the world. A city that is set on a hill cannot be hidden (Matthew 5:14). Matthew 5:14. Nor do people light a candle and put it under a bushel (Matthew 5:15), but on a candlestick, and it gives light to all who are in the house. Matthew 5:15. Let your light so shine before people, that they may see your good works (Matthew 5:16) and glorify your Father who is in heaven. Matthew 5:16.