Seeing you have purified your souls in your obedience to the truth through the Spirit in sincere brotherly affection, love one another from the heart fervently:
see that ye love one another: Since Peter has just commended them for their undisguised love for one another, it seems strange that he would immediately admonish them to "love one another." The explanation is that he uses two different words that are translated love. The first is a friendly love; the latter is a self-sacrificing love (1 Corinthians 13:4-8; Galatians 5:22; John 21:15). This command is based on the worthiness or preciousness of the person loved. It is the response of the heart to the worth of the one loved (John 3:16).