谁说看天空眼泪不会流下
[shéi shuō kàn tiān kōng yăn lèi bù huì liú xià]
Who says that looking at the sky will not make you cry implies that even the most seemingly tranquil scenes (like a beautiful sky) can evoke profound sadness, perhaps reflecting inner turmoil or a bittersweet nostalgia triggered by nature.