Luke 10:5

But it is said, Peace be to this house, that is, to them that dwell in the house. As if he says, I speak unto all, both the greater and the less, yet should not your salutation be addressed to them that are unworthy of it.

(Hom. 35. in Matt.) Peace is the mother of all good things, without it all other things are vain. Our Lord therefore commanded His disciples on entering a house first to pronounce peace as a sign of good things, saying, Into whatever house ye enter, first say, Peace be to this house. (Hom. 32. in Matt. Orat. cont. Jud. 3.) And hence he who presides in the Church gives it, saying, Peace unto all. Now holy men ask for peace, not only that which dwells among men in mutual intercourse, but that which belongs to ourselves. For oftentimes we wage war in our hearts, and are disturbed even when no one troubles us; bad desires also frequently rise up against us. (ubi sup.) But lest any one should say, I am spending my own property in preparing a table for strangers, He first makes them offer the gift of peace, to which nothing is equal, that you may know that you receive greater things than you give.

But again, when received yourself by brethren, you will not make earthly refreshments prior to heavenly, for your faith will forthwith be judged. Or else how will you-according to the precept -say, "Peace to this house," unless you exchange mutual peace with them who are in the house?

Third, as regards showing kindness, he adds: And into whatever house you enter, first say: Peace to this house: so that it may appear that you are men who love and announce peace, according to that passage of Isaiah 52: "How beautiful upon the mountains …

There follows: Into whatsoever house you enter, first say: Peace be to this house. The peace which is offered from the mouth of the preacher either rests in the house, if there be a son of peace in it, or returns to the same preacher; because either someone will be predestined to life, and follows the heavenly word which he hears; or if no one shall have been willing to hear, the preacher himself will not be without fruit, because peace returns to him, since a reward is recompensed to him from the Lord for the labor of his work.

"Into whatever house you enter," He says, "first say: peace be to this house," that is, greet those who are in the house.

In whatever house you enter, first say: Peace be to this house. And if a son of peace be there, your peace will rest on him. But if not, it will return to you. The peace which is offered from the mouth of the preacher …

(1.) The charge given them was, Whatsoever house they entered into, they must say, Peace be to this house. Here, [1.] They are supposed to enter into private houses; for, being not admitted into the synagogues, they were forced to preach where they could have liberty. And, as their public preaching was driven into houses, so thither they carried it.

The verses before us relate a circumstance which is not recorded by any Gospel writer except Luke. That circumstance is our Lord's appointment of seventy disciples to go before Him, in addition to the twelve apostles. We do not know the names of any of these disciples. Their subsequent history has not been revealed to us. But the instructions with which they are sent forth are deeply interesting, and deserve the close attention of all ministers and teachers of the Gospel. The first point in our Lord's charge to the seventy disciples — is the importance of prayer and intercession.

The verses before us relate a circumstance which is not recorded by any Gospel writer except Luke. That circumstance is our Lord's appointment of seventy disciples to go before Him, in addition to the twelve apostles. We do not know the names of any of these disciples. Their subsequent history has not been revealed to us. But the instructions with which they are sent forth are deeply interesting, and deserve the close attention of all ministers and teachers of the Gospel. The first point in our Lord's charge to the seventy disciples — is the importance of prayer and intercession. This is the leading thought with which our Lord opens His address. Before He tells His ambassadors what to do, He first bids them to pray, "Pray to the the Lord of the harvest, that He would send forth laborers into his harvest." Prayer is one of the best and most powerful means of helping forward the cause of Christ in the world! It is a means within the reach of all who have the Spirit of adoption. Not all believers have money to give to missions. Very few have great intellectual gifts, or extensive influence among men. But all believers can pray for the success of the Gospel — and they ought to pray for it daily. Many and marvelous are the answers to prayer which are recorded for our learning in the Bible. "The fervent prayer of a righteous man avails much." (James 5:16.) Prayer is one of the principal weapons which the minister of the Gospel ought to use. To be a true successor of the apostles, he must give himself to prayer — as well as to the ministry of the word. (Acts 6:4.) He must not only use the sword of the Spirit, but pray always, with all prayer and supplication. (Ephesians 6:17,18.) This is the way to win a blessing on his own ministry. This, above all, is the way to procure helpers to carry on Christ's work. Colleges may educate men.

Peace be to this house - See on Mat 10:12 (note).