I'm looking at the headings in Chapter 10 in The New Interpreter's Bible: first, is "The Mission of the Twelve," then three ominous ones, "Coming Persecutions," "Whom to Fear," and "Not Peace, but a Sword."
Matthew is speaking to the church of his time and to ours. Discipleship can be tough.
Then I look at the heading of the last section, today's reading: Rewards. Discipleship can have rewards. Matthew tells them (and us): Some will welcome you. You have given up a lot in order to take the message to them. Some will respond, and in responding, will be rewarded.