"But I thought it necessary to send to you Epaphroditus, my brother and fellow worker and fellow soldier, who is also your messenger and minister to my need; because he was longing for you all and was distressed because you had heard that he was sick. For indeed he was sick to the point of death, but God had mercy on him, and not on him only but also on me, so that I would not have sorrow upon sorrow. Therefore I have sent him all the more eagerly so that when you see him again you may rejoice and I may be less concerned about you. Receive him then in the Lord with all joy, and hold men like him in high regard; because he came close to death for the work of Christ, risking his life to complete what was deficient in your service to me." (Philippians 2:25-30)I find it odd that Paul would refer to Epaphroditus as both his fellow worker and a fellow soldier. While many fought against Paul, it's hard to imagine Paul, who spoke so elegantly about the virtues of love, to be one who was militant in his ministry of the Gospel. However, the Greek word used here for "fellow soldier" comes from a root word that could also mean a fellow "camper-outer". The idea of this term is not so much meant to convey a militancy but to refer to those who have gone out on a campaign or who have entered into a cause. Both Paul and Epaphroditus had gone out for the cause of the Gospel.
It is important to note the connection between Epaphroditus and the church at Philippi. The sending out of Epaphroditus was not something the leaders thought us, nor was it something Epaphroditus devised himself, but it was a decision that the church made together. They were all vested in the decision to send Epaphroditus just as they were all invested in Epaphroditus. In sending Epaphroditus they were sending themselves. In receiving Epaphroditus, Paul refers to him as "your messenger". The Greek word is literally "apostle". Epaphroditus was sent as an apostle from Philippi to Paul to deliver support to him for which the church as a whole was unable to do because of their distance from Paul.
At first read, it almost seems arrogant that Paul would speak of the deficiency of the service that the Philippians owed to Paul. However, this idea of a deficiency Paul spoke of in other places. To the Corinthian church, he spoke of their deficiency of support that was met by the sending of Stephanas, Fortunatus, and Achaicus, "I rejoice over the coming of Stephanas and Fortunatus and Achaicus, because they have supplied what was lacking on your part. For they have refreshed my spirit and yours. Therefore acknowledge such men." (1 Corinthians 16:17-18) Paul also speaks of his desire to go to Thessalonica to provide what was lacking, or deficient, in their faith. "as we night and day keep praying most earnestly that we may see your face, and may complete what is lacking in your faith." (1 Thessalonians 3:10) Moreover, Paul saw it as his mission and calling to fill up what was lacking in the sufferings of Christ as they pertained to the benefit of the church. "Now I rejoice in my sufferings for your sake, and in my flesh I do my share on behalf of His body, which is the church, in filling up what is lacking in Christ's afflictions. Of this church I was made a minister according to the stewardship from God bestowed on me for your benefit, so that I might fully carry out the preaching of the word of God." (Colossians 1:24-25)
It seems to me that it is the work of an apostle to fill up what is lacking in the faith, lives, and support of others, be they Paul, Epaphroditus, or anyone else sent out as a messenger of love and care. For just as Paul was sent by God, Epaphroditus was sent by the Philippians. This idea of an apostle helps us to understand what Paul wrote when he said, "And He gave some as apostles, and some as prophets, and some as evangelists, and some as pastors and teachers, for the equipping of the saints for the work of service, to the building up of the body of Christ." (Ephesians 4:11-12) Here, the word "equipping" means to fully furnish. God has sent people into our lives and into the church to fill up what is lacking in us; to finish in us the work that God has begun. Just as Epaphroditus was sent to Paul to finish the work that the Philippians had started in their care for Paul, so God sent Paul to finish in us the work He stated in our lives. This is the true work of an apostle.