in time of prosperity, friends will be plenty; in time of adversity, not one amongst twenty. 富在深山有远亲，穷在闹市无人

thy friend has a friend and thy friend’s friend has a friend so be discreet. 你的朋友有朋友，朋友的朋友又有朋友，所以要谨慎小心。

to preserve a friend three things are required: to honour him present, praise him absent, and assist him in his necessities. 维持友谊需要三点∶当面尊重他，背后赞扬他，需要时帮助他。

a friend is never known till a man has need. 不到患难时，永远不能认识真正的朋友。

a friend is not so soon gotten as lost. 交友慢，失友快。

trust not the praise of a friend, nor the contempt of an enemy. 不要信赖朋友的赞扬，也不要仇敌的轻蔑放在心上。

a friend to everybody is a friend to nobody. 广交友，无深交。