13 “Go ye” then “to them that sell,” this have you been accustomed to do. But we will not give to you. Why? “Lest there be not enough for us and you.” What is, “lest there be not enough”? This was not spoken in any lack of hope, but in a sober and godly humility. For though the good man have a good conscience; how knows he, how He may judge who is deceived by no one? He has a good conscience, no sins conceived in the heart solicit him, yet, though his conscience be good, because of the daily sins of human life, he says to God, “forgive us our debts;” seeing he has done what comes next, “as we also forgive our debtors.” He has broken his bread to the hungry from the heart, from the heart has clothed the naked; out of that inward oil he has done good works, and yet in that judgment even his good conscience trembles.
Source: Sermons on Selected Lessons of the New Testament (New Advent)