Matthew 10:13

Let - To hinder or obstruct.

If that house be worthy - If that family be proper for a preacher to lodge in, and the master be ready to embrace the message of salvation.

Your peace - The blessings you have prayed for shall come upon the family: God will prosper them in their bodies, souls, and substance.

But if it be not worthy - As above explained.

Let your peace - The blessings prayed for, return to you. Προς υμας επιϚραφητω, it shall turn back upon yourselves. They shall get nothing, and you shall have an increase.

The trials, disappointments, insults, and wants of the followers of Christ become, in the hand of the all-wise God, subservient to their best interests: hence, nothing can happen to them without their deriving profit from it, unless it be their own fault.

If the house be worthy - That is, if the "family" be worthy, or be willing to receive you as my disciples.

Let your peace come upon it - That is, let the peace or happiness which you seek or for which you pray in saluting it (see Luke 10:5), come upon it; or seek their peace and happiness by prayer, instruction, by remaining with them, and imparting to them the blessings of the gospel.

But if it be not worthy ... - If the family be unwilling to receive you; if they show themselves unfriendly to you and your message.

Let your peace return to you - This is a Hebrew mode of saying that your peace shall not come upon it, Psalm 35:13. It is a mode of speaking derived from bestowing a gift. If people were willing to receive it, they derived the benefit from it; if not, then of course the present came back or remained in the hand of the giver. So Christ figuratively speaks of the peace which their labor would confer. If received kindly and hospitably by the people, they would confer on them most valuable blessings. If rejected and persecuted, the blessings which they sought for others would come upon themselves. they would reap the benefit of being cast out and persecuted for their Master's sake, Matthew 5:10.

10:13 If the house be worthy - of it, God shall give them the peace you wish them. If not, he shall give you what they refuse. The same will be the case, when we pray for them that are not worthy.