不要怪洋葱呛你鼻催你泪只怪你为何拆它皮刨它心
[bù yào guài yáng cōng qiāng nĭ bí cuī nĭ lèi zhĭ guài nĭ wéi hé chāi tā pí bào tā xīn]
'Don't blame the onion for stinging your nose and bringing tears to your eyes, but only blame you for peeling off its layers.' The metaphor here speaks to how someone might unknowingly provoke others into revealing their emotions or weaknesses, leading to hurt feelings on both sides.