句子结构对称，使用并列动词 increases 和 reduces，清晰地表达了友谊的双重作用。
All innocent wishes that have been thwarted deserve deeper sympathy. — Charles Dickens, A Christmas Carol
Only the genius dares to challenge fate. — Victor Hugo
Wisdom is superior to knowledge. — Blaise Pascal
Friendship increases joy and reduces sorrow. — Thomas Edison
A man only realizes the intensity of his desires after he has failed. — Honoré de Balzac, Père Goriot
If you do not know, ask; if you cannot do it, learn. — Dong Zhongshu
My goal is simple: to understand the fundamental nature of the universe — why it is as it is, and why it exists at all. — Stephen Hawking
The most important thing in work is efficiency. — J. Addison
Simplicity is the ultimate sophistication. — Leonardo da Vinci
With eyes open to the world, with a heart devoted to the nation. — Song Jiaoren
Any matter, if one is willing and content, can always become simple. — Anni宝贝
Prime youth does not come again; a day is hard to repeat. One should encourage oneself in time, for time does not wait for anyone. — Tao Yuanming
Caution is the eldest child of wisdom. — Victor Hugo
Particularism makes people completely forget the simple and clear truth that a human is a human. — Rabindranath Tagore
Success — the touchstone of merit and fault. — Lord Byron
一切受了挫折的、无邪的愿望，都应该得到更深的同情。——狄更斯《圣诞故事集》
敢于冲撞命运才是天才。——雨果
智慧胜于知识。——巴斯卡
友谊能增进快乐，减少痛苦。——爱迪生
一个人要失败之后，方始发觉他欲望的强烈。——巴尔扎克《高老头》
不知则问，不能则学。——董仲舒
我的目标很简单，就是把宇宙的本源弄明白——它为何如此，它为何存在。——霍金
工作中最重要的提高效率。——约·艾迪生
简单是终极的复杂。——达·芬奇
白眼观天下，丹心报国家。——宋教仁
任何一件事情，只要心甘情愿，总是能够变得简单。——安妮宝贝
盛年不重来，一日难再晨。及时宜自勉，岁月不待人。——陶渊明
谨慎是智慧的长子。——雨果
宗派主义，使人完全忘记了人就是人这个简单明白的真理。——泰戈尔
成功——功与过的试金石。——拜伦
"Friendship exchanges sincerity for sincerity, communicating heart to heart."
"Friends may drift away as ambitions and lifestyles diverge."
"If you wish to gain many good friends, you must first become a good friend yourself."
"Do not involve money when making friends, as relationships mixed with interests are often difficult to maintain."
"Friendship is a light, flowing spring; it is the tears shed over shared sorrows."