12. Salute it. As they could not distinguish the devout worshippers of God from despisers, he enjoins them to address in a friendly manner any family which they may have occasion to meet. The act of saluting is a kind of opening to a conversation. They had already been warned to look out for persons to entertain them, whose religious zeal was generally known and believed. But as it sometimes happens that persons of lofty reputation, when they are brought to a serious trial, discover their impiety, it was proper that this rule should be expressly laid down. The meaning therefore is: “Make trial, when you first enter, whether your entertainers will cheerfully submit to hear you. Whoever shall willingly embrace your doctrine, remain in their house, that your salutation may be confirmed. If any shall reject, depart from them immediately, and, so far as lies in your power, withdraw your salutation.”