他曾经是你致命的伤他曾经是你攻心的痛
[tā céng jīng shì nĭ zhì mìng de shāng tā céng jīng shì nĭ gōng xīn de tòng]
This reflects deep emotional trauma left by someone previously, indicating this person was once both a severe exterior wound and an internally agonizing hurt, emphasizing its significant impact on the individual's psychology.