A true friend is one soul in two bodies.
挚友如异体同心。—— Aristotle 亚里士多德
Love your neighbor as yourself.
爱邻如己。—— Jesus Christ 耶稣
One good turn deserves another.}
好心得好报。—— Heywood 希伍德
A friend in need is a friend indeed.
患难朋友才是真朋友。—— Ray 雷
Good words cost nothing, but are worth much.
良言不费分文，但价值甚大。—— T. Fuller 富勒
When you are at Rome do as the Romans do.
入乡随俗。—— Penn 班
Hearts may agree, though heads differ.
意见总有分歧，但其心则仍可能一致。—— T. Fuller 富勒
Birds of a feather flock together.
同声相应，同气相求。—— Cicero 西塞罗
Like to like.
物以类聚。—— Cicero 西塞罗
Slow help is no help.
迟助等于无助。—— Trench 特兰芝
It takes two to make a quarrel.
必须有两个人，才有争吵。—— Henry Kingsley金斯莱
Be slow in choosing a friend; slower in changing.
择友宜慎，弃之更宜慎。—— Benjamin Franklin富兰克林
Never judge from appearance.
不要以貌取人。—— Tindale 巅岱
A man should keep his friendship in constant repair.
一个人应当让他的友谊常新。—— Samuel Johnson 琼生
Sometimes the best helping hand you can get is a good, firm push.
有时侯，及时有力的鼓励是对你最好的帮助。—— John Thomas 托马斯
A friend is a present which you give yourself.
朋友是你送给自己的一份礼物。—— Robert Louis Stevenson 史蒂文森
Fate chooses your relatives, you choose your friends.
亲戚乃命定，朋友靠选择。—— Abbe Jacques Delille 德力尔
A faithful friend is the medicine of life.
忠实的朋友是人生的良药。—— William Shakespeare 莎士比亚
The bird a nest, the spider a web, man friendship.
鸟儿有巢，蜘蛛有网，人类有友谊。—— William Blake布莱克
He makes no friends who never made a foe.
从来没有敌人的人也不会有朋友。—— Alfred Tennyson丁尼生
We choose our friends by instinct, but we keep them by judgment.
我们选择朋友靠的是本能，但保持友谊靠的是判断。—— Alfred Capus 卡皮
Friendship is love without his wings.
友谊是没有羽翼的爱。—— George Gordon Byron 拜伦
Suspicion is the poison of true friendship.
猜疑是真诚友谊的一副毒剂。—— St. Augustine奥古斯丁
True friendship is a plant of slow growth.
真正的友谊像生长缓慢的植物。—— George Washington 华盛顿
A hedge between keeps friendship green.
朋友间适当保持距离，可使友谊常青。—— J. A. Charles 查尔斯
https://www.unjs.com/