Philippians is the Book of thanksgiving and joy, rejoicing in the Lord and being content in every circumstance. Elsewhere, Paul teaches these doctrines; in Philippians he exemplifies them. The church at Philippi sent a grace gift to Paul in Rome by the hand of Epaphroditus. The gift was profitable for Paul, but eternally profitable for the Phippians as a fragrant aroma sacrifice to God the Father. Rejoicing is the repeated theme, reflected by the Greek words used.
“To the Philippians” is named for the recipients of the epistle. Along with Ephesians, Colossians, & Philemon, this book is one of the prison epistles.
Paul (the Apostle, but not calling himself as such) is the primary author, with the scribal assistance and courier service of Timothy.