该句使用了并列结构，通过'infinite'和'takes many forms'两个维度全面描述了苦难的特征，表达简洁有力。
Suffering not only evokes deep sympathy but also instills a fear of hurting others' feelings and generates profound respect for those who can endure pain. — Tolstoy
A person in pain wants to make those around them suffer as well! Is it not a serious defect to lack such self-control? — Musset
Suffering is infinite and takes many forms. Sometimes, it stems from material cruelty, such as disasters, illness, the injustice of fate, or human malice; other times, it is hidden deep within the human soul. Suffering in such contexts is equally pitiful and irreversible. For humans cannot choose their own lives; they did not ask to be born, nor did they ask to become what they are. — Romain Rolland
Among all sufferings, the most noble, intense, and personal is the suffering of love. — Engels
The deeper we understand this strange pain, the more we can alleviate its intensity. — Dickens
Many sorrows are self-chosen. — Kahlil Gibran
It is a tremendous agony for a person filled with melancholy to be thrown into a joyous and lively occasion, acting as a part that clashes so completely with their own mood. — Scott
There is no end to the sufferings of the world, yet the greatest pain is that which arises from the helpless struggles of one who seeks to flee from darkness toward a light that stirs the soul yet remains incomprehensible. — Shchedrin
痛苦不仅能唤起深切的同情，还会让人产生唯恐伤害他人情感的顾虑，并对那些能够忍受痛苦的人生出崇高的敬意。——托尔斯泰
一个遭受痛苦的人，竟然想要让周围的人也一同受苦！一个人如此缺乏自制力，难道不是一种严重的缺陷吗？——缪塞
痛苦是无穷无尽的，它呈现出多种形态。有时，它源于物质的摧残，如灾难、疾病、命运的不公或人类的恶意；有时，它则深藏于人的内心。在这种境遇下的痛苦，同样令人怜悯，同样无可挽回。因为人无法选择自己的人生，人既未曾要求来到世间，也未曾要求成为现在的样子。——罗曼·罗兰
在所有的痛苦中，最高尚、最强烈且最具个人色彩的，莫过于爱情的痛苦。——恩格斯
我们对这种奇特的痛苦理解得越透彻，就越能减轻它带来的折磨。——狄更斯
许多苦难，其实是你自己选择的。——纪伯伦
一个满怀忧郁的人，偏偏被抛入一个欢乐热闹的场合，充当一个与自己心境极不相符的配角，这无疑是莫大的痛苦。——司各特
世间有无数痛苦，然而最大的痛苦在于：当人渴望从黑暗奔向那激动心灵却又不可理解的光明时，那些无力的挣扎所带来的煎熬。——谢德林
"Li Cheng had a difficult childhood."
"The world is inherently filled with suffering; there are no exceptions."
"Everyone experiences misfortune and pain in life."
"If one is unwilling to endure hardship, how can one secure a bright future?"
"perhaps it is only after tasting all the bitterness"