Did Christ instruct us in matters of etiquette and courtesy? Of course He did. Christ's instructions are clear: "In everything, therefore, treat people the same way you want them to treat you, for this is the Law and the Prophets" (Matthew 7:12 NASB). Jesus did not say, 'in somethings, treat people as you wish to be treated.' And, He did not say, 'from time to time, treat others with kindness.' Christ said that we should treat others as we wish to be treated in every aspect of our daily lives. This, of course, is a tall order indeed, but as Christians, we are commanded to do our best.
Today, be a little kinder than necessary to family members, friends, and total strangers. And, as you consider all the thing that Christ has done in your life, honor Him with your words and with your deeds. He expects no less.