True friendship is like health, not to lose, can not appreciate the precious真挚的友谊犹如健康，不到失却时，无法体味其珍贵。 --（英）培根

Where there is marriage without love, there will be love without marriage. 有没有爱情的婚姻，就会有没有婚姻的爱情。——Benjamin Franklin

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。

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。

We can live without a brother, but not without a friend 我们生活中可以没有兄弟，但不能没有朋友。

We can live without our friends, but not without our neighbours 生活可无友，邻居不能无。

When a friend asks, there is no tomorrow 朋友的要求不要拖。