关于友谊的英语谚语数量众多，以下是精选的30句经典谚语，涵盖友谊的本质、选择标准及相处之道：

一、友谊的本质

A friend in need is a friend indeed.（患难见真情）患难时刻才能显现真正的友情

The more we love our friends, the less we flatter them.（爱之深，夸赞少）越珍视越少虚伪奉承

A friend to all is a friend to none.（滥交者无友）真正的朋友是专一的

二、选择朋友的标准

Be slow in choosing a friend； slower in changing.（择友需谨慎，变心需审慎）强调忠诚度的重要性

A friend is easier lost than found.（得友难，失友易）凸显友情的珍贵

The smell of coin is often the knell of friendship.（铜臭味浓预示友情不纯）警示物质与情感的界限

三、相处之道

Between friends all is common.（朋友间无需分彼此）体现亲密关系中的平等与包容

Old friends and old wine are best.（老友如陈酒，越品越醇）比喻经时间考验的友情更持久

A faithful friend is hard to find.（益友难得）强调忠诚友情的稀有性

四、其他经典表述

Life without a friend is a life without a sun.（人生若无朋友，犹如生活无太阳）用比喻手法强调友情的必要性

A father is a treasure, a brother is a friend, but a friend is always a brother.（父如珍宝，兄如兄弟，友则永恒）通过类比凸显友情的超越性

The friendship of a gentleman is insipid as water.（君子之交淡如水）形容高尚友情质朴无华

A leopard cannot change its spots.（积习难改）警示友情中需接纳对方缺点

这些谚语从不同角度诠释了友谊的多元内涵，既有对真情的赞颂，也包含相处智慧，可作为理解西方文化中友情价值观的参考。