Two of the most important questions you can ever ask yourself (and others) are: "Have you repented and believed the Gospel?" and if so, "How is the Gospel at work in you today?" This is the heart of what Paul is getting at here in 1 Thessalonians 2:13-16. The Gospel has an impact. Day by day, believers are to turn further and further away from a life of sin and turn to a life of holiness.