In Paul's closing words, he asks for personal greetings for several people; but in the middle of all of this he gives one final instruction that can be summarized as this: watch out and walk wisely. Now that Paul has unpacked this gospel, he wants the Roman saints to watch out for those that preach a contrary gospel and seek to cause divisions - even avoid them. Also, now that he has unpacked the gospel, Paul wants the Romans saints to exercise wisdom and discernment in their obedience.