Clearly, Christ’s instruction is that they greet the household as a whole, the people in the house, although the Greek is ‘house’, as in the phrase ‘house of Israel’. But whose house is this? Is this about evangelising door to door, house to house, or is it about the household which God has led them to, where they are to accept hospitality? Surely the latter since their ministry was to preach and not to go house to house.
What is the application to us? Do ordinary Christians have the power to bless and to withdraw blessing today? We are to bless even those who persecute us: we ‘bless and curse not’ (Romans 12:4). We read the characters of men and women; but we understand that gospel blessings belong only to those with faith. Our blessing is a prayer, a request to God to do what we have no power to do ourselves. He may answer our prayer, but he may choose not to. What he will do is beyond our understanding, but we rightly desire good to all people.
Why was this instruction given? Why were the disciples not content to leave the household in God’s hands, since he knew better than they did what was the true character of each house? Why was it necessary for the disciples to be seen to exercise discernment? Because the hypocrite must learn that he cannot steal a blessing from God. The disciples were to stand on the side of truth, and not favour men more than God, however inconvenient it might be for them.