(a) In Paul's letter to the Philippians, Paul urges the Christians to possess a sense of love, sharing in the spirit, affection and sympathy in order to complete the joy of being Christians by living in harmony with one another. The Christians are warned to desist from any act of selfishness and conceit but should show humility. This means they should put others first before themselves. They should imitate Jesus Christ whose humility should be a model for them. Jesus was in form of God, but did not equate himself with God. Instead, he humbled himself as a servant, up to the point of death. As a result of Jesus' humility, God highly exalted him both in heaven and on earth. Therefore, Jesus is Lord to the glory of the father.