The document provides an overview and themes of the book of Philippians from a study titled "The Life of Joy". It discusses that Paul's letter reveals a joyous attitude despite imprisonment, with joy mentioned 16 times. Major themes are: 1) Paul encourages the Philippians to rejoice as he does, finding joy through faith, not circumstances. 2) Fellowship and partnership are emphasized. 3) The letter speaks of unity and selflessness amid some discord. 4) Many references are made to being "in Christ", the source of life. Discussion questions provided explore distinguishing biblical joy from happiness and overcoming "joy killers".