对你自己忠实，/并长久坚持，/你将不会对别人虚情假意（莎士比亚）。disloyal的人对人或事业缺乏忠心和忠诚：

• To thine own self be true, / And it must follow, as the night the day, / Thou canst not then be false to any man(Shakespeare.One who isdisloyalis false to persons or things that are due allegiance: