(12) Not as Cain, [who] was of that wicked one, and slew his brother. (13) And wherefore slew he him? Because his own works were evil, and his brother's righteous.
(12) An amplification taken from the contrary example of Cain who slew his brother.
(13) A short digression: Let us not marvel that we are hated by the world for doing our duty, for such was the condition of Abel who was a just person: and who would not rather be like him than Cain?