A.T. Robertson Commentary 2 Peter 1:7

"and in [your] godliness brotherly kindness; and in [your] brotherly kindness love." — 2 Peter 1:7 (ASV)

Love of the brethren (την φιλαδελφιαν). See 1 Peter 1:22.

Love (την αγαπην). By deliberate choice (Matthew 5:44). Love for Christ as the crown of all (1 Peter 1:8) and so for all men. Love is the climax as Paul has it (1 Corinthians 13:13).