Having created joy in his readers by referring to the sterling examples of Timothy and Epaphroditus, Paul warned them about certain other people who professed to be servants of God.
He introduced this section of his epistle with a transitional statement. "Finally"(Gr. to loipon) introduces such a statement here as well as elsewhere (cf. 1 Cor. 1:16; 4:2; 2 Cor. 13:1; 1 Thess. 4:1; 2 Thess. 3:1; Gal. 6:17). Usually this word does not mark a conclusion so much as a transition on the way to a conclusion.98It introduces what remains to be said.99Anyone who has listened to much preaching knows that Christian communicators often say "finally"long before the message ends.
The apostle's primary exhortation here was that his readers should rejoice in the Lord. They might rejoice in Epaphroditus' return, or in his recovery, or in Paul's prospect of release and return to Philippi. All of these were legitimate though less important reasons for rejoicing. We have noticed the consistent emphasis on joy and rejoicing that has marked this letter so far (1:3, 4, 18, 25; 2:1, 2, 17, 18, 19, 28, 29; cf. 4:1, 4, 10, 18). Joy is the prevailing mood of Philippians, but it is not its major theme. Paul gave the importance of rejoicing special emphasis here. Regardless of circumstances the Christian can and should always rejoice in the person and work of Jesus Christ. He is the basis of true joy and the sphere in which it thrives.100
False teachers can rob Christians of joy. Paul proceeded to deal with this threat in the rest of this chapter.
He introduced his comments by assuring his readers that he did not regard the need to warn them as a burden even though he had already instructed them on this subject. Paul may have been alluding to what he had just written about unbelievers who opposed the Philippians' witness (1:27-30). He may have been referring to previous instruction he had given them in person or in writing. Further exhortation would be an additional safeguard against their capitulating because of this evil influence.