That is, make full or complete my joy. The apostle already has joy (ch. 1:4), and it remains only that this should be full and complete (cf. John 3:29; 15:11; 17:13). The Philippians are to make it so by allowing his appeal to prevail with them and by maintaining and exhibiting the virtues to which he exhorts them.

 Or, “be of the same mind” (cf. on ch. 1:7). The kind of concord he is enjoining is defined in the two following clauses.

 Mutual love produces mutual processes of thought and results in united action (cf. John 13:35; Col. 1:4; 1 Thess. 3:12; 2 Thess. 1:3).

Gr. sumpsuchoi, “harmonious,” “peaceable,” “united,” derived from sun, “with,” “together with,” and psuchē, “soul.”

 Literally, “thinking the one thing.” Paul recognizes the necessity for the children of God to demonstrate that those who are in harmony with God can live in full harmony with one another. Few things belie the Christian profession more than inability to live and work harmoniously with other Christians. When we accept Christ we become members of His body. To accomplish the greatest amount of good, the body must function as a unit (cf. on 1 Cor. 12:12-27). The work of God will prosper if the people of God draw together and work in unity (see TM 489; 1T 113, 114; 8T 183, 239-243).