1 Thessalonians 4:9-12
v9-10: Love for one another is "the uniform of Christ's family." This side of heaven no one loves perfectly, and so we need to be urged and encouraged to love one another more and more. The love for one another in the church is to extend "toward all the saints, no matter how distant they are from [us] in location, and no matter if they differ from [us] in certain opinions or practices of less significance."
v11: Leading a quiet life is something that followers of Jesus should seek to live. They are not to be "given to strife, conflict, or division," nor are they to be "busybodies, interfering in other people's affairs."
v12: Laziness can lead to people finding themselves in difficult circumstances and being a burden to their friends. It is not behaviour that is appropriate for someone who believes the gospel.