3:13 Forbearing one another, and forgiving one another. How often and earnestly long-suffering and forbearance are enjoined! Nor have we grounds for expecting that God will forgive us unless we also forgive (Mt 6:12). Christ is our example.
3:13 Forbearing one another - If anything is now wrong. And forgiving one another - What is past.
3:12-17 We must not only do no hurt to any, but do what good we can to all. Those who are the elect of God, holy and beloved, ought to be lowly and compassionate towards all. While in this world, where there is so much corruption in our hearts, quarrels will sometimes arise. But it is our duty to forgive one another, imitating the forgiveness through which we are saved. Let the peace of God rule in your hearts; it is of his working in all who are his. Thanksgiving to God, helps to make us agreeable to all men. The gospel is the word of Christ. Many have the word, but it dwells in them poorly; it has no power over them. The soul prospers, when we are full of the Scriptures and of the grace of Christ. But when we sing psalms, we must be affected with what we sing. Whatever we are employed about, let us do every thing in the name of the Lord Jesus, and in believing dependence on him. Those who do all in Christ's name, will never want matter of thanksgiving to God, even the Father.