Adam Clarke

Let brotherly love continue - Be all of one heart and one soul. Feel for, comfort, and support each other; and remember that he who professes to love God should love his brother also. They had this brotherly love among them; they should take care to retain it. As God is remarkable for his φιλανθρωπια, philanthropy, or love to man, so should they be for φιλαδελφια, or love to each other. See the note on Tit 3:4.