12-15"When you knock on a door, be courteous in your greeting. If they welcome you, be gentle in your conversation. If they don't welcome you, quietly withdraw. Don't make a scene. Shrug your shoulders and be on your way. You can be sure that on Judgment Day they'll be mighty sorry—but it's no concern of yours now.
16"Stay alert. This is hazardous work I'm assigning you. You're going to be like sheep running through a wolf pack, so don't call attention to yourselves. Be as cunning as a snake, inoffensive as a dove.