Paul has already warned the church of Philippi of the external opposition that is to come, and now he warns them of the internal opposition. He calls the church of Philippi to complete his joy by being united with one another. 

• The Foundation of Christian Unity (v1)
  • Believers are unified by the encouragement of Christ 
  • Believers are unified by their love for one another  
  • Believers are unified by the fellowship of the Spirit 
  • Believers are unified by their compassion for one another 
• The Command of Christian Unity (v2a)
  • Complete the joy of others
• The Expression of Christian Unity (v2b-4)
  • Express unity by being of one mind 
  • Express unity by being humble
  • Express unity by being others minded