Paul wrote this letter to the Philippians to express his appreciation for their care and support of him while he was imprisoned. He discusses his joy even in difficult circumstances, and encourages the Philippians to stand firm in their faith and to support one another through humility, unity, and thankfulness. Paul provides examples from Jesus Christ, Timothy, and Epaphroditus to emphasize living honorably and serving others. He advises thinking on virtues and finding contentment through giving thanks to God, who provides for all needs.