Rejoice in hope. Be patient in suffering. Persevere in prayer.
We are reminded that being a Christian does not insulate us agains suffering, financial difficulty, persecution, or tragedy. Being a Christian shows us a way to face life's tribulations.
Paul's sermon here is not so much "How to become a Christian," as it is "What to do now that you're a Christian." He stresses, as he has done before, that Christians love each other, really love each other. Give money if they need money. Don't seek revenge against those who may have earned it. Live peaceably (I'm relieved to say that he adds, "as much as possible.)