9 But concerning brotherly love you have no need that I should write to you, for you yourselves are taught by God to love one another; 10 and indeed you do so toward all the brethren who are in all Macedonia. But we urge you, brethren, that you increase more and more; (1 Thessalonians 4:9–10, NKJV)
The apostle uses two words for love in this passage; philadelphia (brotherly love) and agape (love). We are to have both warm affection and the abiding welfare of our brethren in our hearts and in our lives. There is always room for improving our brotherly love. God teaches us to love one another, and so we must earnestly strive not to take each other for granted. Brotherly love holds its brethren in high regard and responds with kind consideration toward them. Such love is not confined to our own circle of saints, for instance, just the local church to which we belong. The Thessalonian Christians’ love included the saints in the surrounding area. Furthermore, there is no limit to love. While Paul commended them for loving their brethren, he urged them to increase their love abundantly. The warm affection of brotherly love (philadelphia) must be coupled with the love (agape) that selflessly attends to others before itself. Agape is an exercise of the will, and so are commanded to “love (agapao) the brotherhood” (1 Peter 2:17). Let us strive to mature in love (agape) and in the warm affection of brotherly love (philadelphia).