悲痛

grief, deep sorrow

p e ɪ̯ ⁵ ⁵ tʰ ʊ ŋ ⁵ ¹
noun Rare #31,939
grief, deep sorrow A strong, often formal or literary word for profound sadness, especially after a loss.
CH: 他还在悲痛中。
EN: He is still grieving.

这表明幸福和悲痛之间只隔着看法。

This shows that happiness and sorrow are separated only by perspective.