幸福只有自己懂痛苦只有自己遗
[xìng fú zhĭ yŏu zì jĭ dŏng tòng kŭ zhĭ yŏu zì jĭ yí]
This expresses the sentiment that happiness and suffering are personal experiences that no one else can truly understand or share. It reflects a lonely perspective on both positive and negative emotions.