若我不知你内心就不会痛我
[ruò wŏ bù zhī nĭ nèi xīn jiù bù huì tòng wŏ]
Translated as 'If I didn't know your heart, I wouldn't be hurt', which implies that one feels pain due to understanding or seeing through another's true feelings. It signifies someone who is emotionally aware and often hurts by such knowledge.