The book of Philippians is recognized as the most delightful of Paul's epistles. Despite the fact that it was written while Paul was imprisoned, there is no other letter written by Paul which contains such an emphasis on rejoicing Throughout this letter, Paul reveals several key principles which will teach us to find contentment, no matter what trials or difficult circumstances we may be facing, and to grow in our love, both for Jesus and for one another, as a people who are united by a common love for Christ.