Jesus sends out the twelve on a short-term mission trip, in preparation for life-long mission. Persecution will come because Jesus did not come to bring only peace, but he came to ply a (metaphorical) sword. In tense times, don’t fear the man who kills only the body but God who can destroy both body and soul in Gehenna. Don’t deny him but acknowledge him in public. People who welcome one of Jesus’s emissaries will receive a reward.