A dog will not howl if you beat him with a bone. 骨头打狗狗不叫。
Adversity is a good discipline. 苦难是磨练人的好机会。
Adversity leads to prosperity. 逆境迎向昌盛。
Adversity makes a man wise, not rich. 患难使人聪明，但不能致富。
Adversity makes strange bedfellows. 身处逆境不择友。
Adversity successfully overcome is the highest glory. 成功地克服困难是最大的光荣。
A fair death honours the whole life. 死得光明，终身荣耀。
A fair face may hide a foul heart. 人不可貌相。
A faithful friend is hard to find. 益友难得。
A fall into the pit, a gain in your wit. 吃一堑，长一智。