a friend to all is a friend to none. 濫交者沒有朋友。
a friend in need is a friend indeed. 患難朋友才是真朋友。
a faithful friend is hard to find. 益友難得。
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。
both together do best of all. 二人同心，無往不勝。
friendship is a love without wings. 友誼是一種無形的愛。
a life without a friend is a life without a sun. 人生沒有朋友, 猶如人生沒有了太陽。
set great store by friendship. 情意重千斤。
a friend is a second self. 朋友乃第二個自我。
between friends all is common. 朋友之間不分彼此。
old friends and old wine are best. 陳酒味醇, 老友情深。
the friendship of a gentleman is insipid as water. 君子之交淡如水。
a bosom friend afar brings a distant land near. 海記憶體知己, 天涯若比鄰。
friendship is like a plant of slow growth. 友誼像生長著的植物, 是慢慢地建立起來的。
a good book is the best of friends, the same today and forever. 好書如摯友, 情誼永不渝。
a man knows his companion in a long journey and a little inn. 路遙知馬力, 日久見人心。
i like a simple friend, who holds my faults like a looking glass before my face. 我喜歡這樣的朋友, 他對我的缺點就像照鏡子一樣直言不諱。
it is well that there is no one without a fault, for he would not have a friend in the world. 世界上沒有不犯錯誤的人，想交沒有錯誤的朋友, 你就沒有朋友。
no man can be happy without a friend, nor be sure of his friend till he is unhappy. 沒有朋友的人不會幸福，不處逆境不能識別朋友。
the more we love our friends, the less we flatter them. 對朋友愛得越深, 奉承得就越少。
the smell of coin is often the knell of friendship. 銅臭味濃往往是友誼的不祥之兆。
if only you have got a bosom friend, there is meaning in your life. 人生得一知己，斯則世同懷視之。