The book of 1 Peter primarily encourages Christians facing persecution to endure their suffering with hope, by imitating Jesus' example of suffering and remaining faithful to God. Christians are called to live exemplary lives that showcase the goodness of Christ to a hostile world, essentially demonstrating that their suffering is a means to glorify God and share the Gospel; it emphasizes the importance of living a holy life even amidst hardship and persecution, with a focus on unity and love within the Christian community.