Adversity makes a man wise, not rich. 逆境出人才。
A fair death honors the whole life. 死得其所,流芳百世。
A faithful friend is hard to find. 知音难觅。
A fall into a pit, a gain in your wit. 吃一堑,长一智。
A fox may grow gray, but never good. 江山易改,本性难移。
A friend in need is a friend indeed. 患难见真情。
A friend is easier lost than found. 得朋友难,失朋友易。
A friend is never known till a man has need. 需要之时方知友。