French thinker)
人世間所有的榮華富貴不如壹個好朋友。 (法國思想家 伏爾泰)
A life without a friend is a life without a sun.
人生在世無朋友，猶如生活無太陽。
Be slow in choosing a friend; slower in changing.
選擇朋友要審慎，摒棄更要審又慎。
A friend in need is a friend indeed.
患難見真交。
A father is a treasure, a brother is a comfort, but a friend is both.
父親是財富，兄弟是安慰，朋友兼而有之。
A friend exaggerates a man's virtue, an enemy his crimes.
朋友宣揚人的美德，敵人誇大人的罪過。
A friend in court is better than a penny in purse.
囊中有錢，不如朝中有友。
A friend is a second self.
朋友是另壹個我。
A friend is best found in adversity.
患難見真友。
A friend is never known till a man has need.
不到患難時，永遠不能認識真正的朋友。
A friend is not so soon gotten as lost.
交友慢，失友快。
A friend to everybody is a friend to nobody.
廣交友，無深交。
A friend without faults will never be found.
沒有缺點的朋友是永遠找不到的。
A joke never gains an enemy but often loses a friend.
開玩笑總不能化敵為友，反而有時會失去朋友。
Better lose a jest than a friend.
寧可不說壹句俏皮話，以免得罪朋友們。
Choose an author as you choose a friend.
選書如擇友。
He that has a full purse never wants a friend.
只要袋裏有，不愁沒朋友。
Life without a friend is death without a witness.
在世無朋友，死後無證人。
Thy friend has a friend and thy friend's friend has a friend so be discreet.
妳的朋友有朋友，朋友的朋友又有朋友，所以要謹慎小心。
To preserve a friend three things are required: to honour him present, praise him absent, and assist him in his necessities.
維持友誼需要三點∶當面尊重他，背後贊揚他，需要時幫助他。