For if God spared not the angels that sinned, but cast them down to hell, and delivered them into chains of darkness, to be reserved unto judgment;
Ver. 4. If God spared not the angels] Though but for one sin only, and that in thought only. It sprang from the admiration of their own gifts, it was confirmed by pride and ambition, it was perfected by envy, stirred by the decree of exalting man's nature above angels in and by Christ. Some say it was a transgression of some commandment in particular (not expressed), as Adam was.