Whatever town or village you enter, find out who in it is worthy, and stay there until you leave. As you enter the house, greet it. If the house is worthy, let your peace come upon it; but if it is not worthy, let your peace return to you.
Thought: in training and sending out his disciples Jesus was trying to teach them to discern how to interact with the kind of people they would come into contact, what to share and when to leave especially when you're not welcome.
The Hebrew word for peace is shalom, which was a standard greeting, of course the New Testament being written in Greek, the word here has a slightly different meaning and here is give a sense of oneness and the joining together and being one, being at peace, with quietness and rest.
This kind of peace is something many long for, and here Jesus is saying something different to the disciples. This peace is something you carry with you and it's yours to give and take, this same scripture is where Jesus is giving authority of unclean spirits to his followers, spirits that would torment people.
The writer often make comments about Jesus’ ability to know what others were thinking, it was more than just a suspicion, it was an inner knowing that he seemed to have by the Holy Spirit. Paul notes this as one of the gifts that the spirit gives the believer. Jesus was often careful on whom he revealed himself too know their hearts and careful not to over share.
Jesus would also tell parables that the discerning would understand yet others without this inside knowledge would think it's a nice story.
hidden these things from the wise and the intelligent and have revealed them to infants;
Discernment — the ability to think biblically about all areas of life — is indispensable to an uncompromising life. It is incumbent upon the Christian to seize upon the discernment that God has provided for in His precious truth! Without it, Christians are at risk of being "tossed here and there by waves, and carried about by every wind of doctrine" (Ephesians 4:14).
2. The peace of Christ.
Peace I leave with you; my peace I give to you. I do not give to you as the world gives. Do not let your hearts be troubled, and do not let them be afraid.
Believers are given this gift of peace from Jesus himself, it's not however the kind of peace that people will find anywhere else. Peace is something that you own, it's given to us and we are then careful on whom we give it to. Paul writes to the Philippians the peace of Christ is different to human peace it passes our natural understanding.
3. A place of authority
Then Jesus summoned his twelve disciples and gave them authority over unclean spirits, to cast them out, and to cure every disease and every sickness
As you go, proclaim the good news, ‘The kingdom of heaven has come near.’ “
See, I am sending you out like sheep into the midst of wolves; so be wise as serpents and innocent as doves.
Do not fear those who kill the body but cannot kill the soul; rather fear him who can destroy both soul and body in hell.