113. That is why the Lord says in Matthew,

Blind Pharisee, cleanse the inside of the cup and the plate first, so that the outside of them may be clean as well. (Matthew 23:26)

And in Isaiah,

Wash yourselves! Purify yourselves! Take away the evil of your deeds from before my eyes! Stop doing evil! And then, even if your sins have been like scarlet, they will become white like snow; even if they have been as red as purple-dyed cloth, they will be like wool. (Isaiah 1:16, 18)

261. 3) What charity is: that it is to perform useful services, everyone in his own occupation.