难驯忘心人易养痴心者
[nán xùn wàng xīn rén yì yăng chī xīn zhĕ]
A difficult thing to forget is one's heart; humans are quick to become obsessed. In English: ‘It’s hard to tame and forget the heart, yet it’s easy to cultivate obsession.' It reflects that human emotions can quickly lead someone into deep feelings but forgetting those feelings and controlling such passion may require more effort.