《新唐书·列传·卷四十五》
父亲活着时就自称尊的，是为逆子；君主健在时，谋夺君位的，是为逆臣。
父在，子称尊为逆子；君在，臣图位为逆臣。
To call oneself “son of Heaven” while one's father is still living is to be a disloyal son; to plot to usurp the throne while one's ruler is still alive is to be a disloyal courtier.