3:14-17 On top of all these things, clothe yourselves with love which is the perfect bond; and let the peace of God be the decider of all things within your hearts, for it is to that peace you were called, so that you might be united in one body. May the word of Christ dwell richly in you with all wisdom. Continue to teach and to admonish each other with psalms and hymns and spiritual songs, singing to God with gratitude in your hearts. And whatever you may be doing in word or in deed, do all things in the name of the Lord Jesus, giving thanks to God the Father through him.
To the virtues and the graces Paul adds one more--what he calls the perfect bond of love. Love is the binding power which holds the whole Christian body together. The tendency of any body of people is sooner or later to fly apart; love is the one bond which will hold them together in unbreakable fellowship.
Then Paul uses a vivid picture. "Let the peace of God be the decider of all things within your heart." Literally what he says is, "Let the peace of God be the umpire in your heart." He uses a verb from the athletic arena; it is the word that is used of the umpire who settled things in any matter of dispute. If the peace of Jesus Christ is the umpire in any man's heart, then, when feelings clash and we are pulled in two directions at the same time, the decision of Christ will keep us in the way of love and the Church will remain the one body it is meant to be. The way to right action is to appoint Jesus Christ as the arbiter between the conflicting emotions in our hearts; and if we accept his decisions, we cannot go wrong.
It is interesting to see that from the beginning the Church was a singing Church. It inherited that from the Jews, for Philo tells us that often they would spend the whole night in hymns and songs. One of the earliest descriptions of a Church service we possess is that of Pliny, the Roman governor of Bithynia, who sent a report of the activities of the Christians to Trajan, the Roman Emperor, in which he said, "They meet at dawn to sing a hymn to Christ as God." The gratitude of the Church has always gone up to God in praise and song.
Finally, Paul gives the great principle for living that everything we do or say should be done and said in the name of Jesus. One of the best tests of any action is: "Can we do it, calling upon the name of Jesus? Can we do it, asking for his help?" One of the best tests of any word is: "Can we speak it and in the same breath name the name of Jesus? Can we speak it, remembering that he will hear?" If a man brings every word and deed to the test of the presence of Jesus Christ, he will not go wrong.