我曾百毒不侵可你却入我心
[wŏ céng băi dú bù qīn kĕ nĭ què rù wŏ xīn]
Means 'Once I was immune to all, but you entered my heart'. Suggests that once the individual was emotionally resilient, indifferent or unfeeling, but has now been touched by genuine love or care for someone.