The end justifies the means. 只要目的正当，可以不择手段。

The early bird catches the worm. 早起的鸟儿有虫吃。

The die is cast. 木已成舟。

The devil sometimes speaks the truth. 魔鬼有时也会说真话。

The devil knows many things because he is old. 老马识途。

The darkest place is under the candlestick. 烛台底下最暗。

The darkest hour is nearest the dawn. 黎明前的黑暗。

The danger past and God forgotten. 过河拆桥。

The cat shuts its eyes when stealing. 掩耳盗铃。

The best man stumbles. 伟人也有犯错时。