《资治通鉴·唐纪·唐纪五十》
他大略是说： 为人长官的人很少能够推究在地位相互变易以后忠诚与宽恕是什么情形，也不能体察大公无私，为国献身是何等情意。
桀用天下而不足，汤用七十里而有馀，是乃用之盈虚，在节与不节耳。 
He said roughly: Few people who are leaders can speculate what loyalty and forgiveness are like after their positions have changed, nor can they understand how selfless and dedicated to the country it is.