A friend is easier lost than found得朋友难，失朋友易。

A friend in need is a friend indeed患难见真情。

A friend is never known till a man has need需要之时方知友。

A friend without faults will never be found完美无缺的朋友是不存在的。

Without a friend the world is a wilderness没有朋友，世界就等於一片荒野。

He is rich enough who has true friends有真朋友的人是富翁。

Friends must part天下无不散之筵席。

Everything is good when new, but friendship when old新朋友总是好的，但老朋友更珍贵。

To prepare a friend, three things are required: to honor him present, praise him absent, and assist him in his necessities维护朋友，有三件事情要做到：当面要尊重他，不在场时要表扬他，苦难时要帮助他。

Between friends all is common朋友之间不分彼此。

Friendship is almost always the union of a part of one mind with a part of another； people are friends in spots友谊是两者思想的结合，志趣相投才能成为朋友。

Set great store by friendship情意重千斤。

The smell of coin is often the knell of friendship铜臭味浓往往是友谊的不祥之兆。

The more we love our friends, the less we flatter them对朋友爱得越深，奉承得就越少。

A good book is a best friend who never turns his back upon us一本好书，莫逆之交。

A friend to all is a friend to none滥交者没有朋友。

A father is a treasure, a brother is a friend父亲是财富，兄弟是朋友。

这些谚语以简洁而深刻的方式表达了友谊的珍贵、忠诚和互助的重要性。希望这些谚语能帮助你更好地理解和珍惜友谊。