动心既是断肠初断肠既是动心果
[dòng xīn jì shì duàn cháng chū duàn cháng jì shì dòng xīn guŏ]
Expresses complex emotions: When one's heart starts to move (fall in love), it’s also when the sorrow begins ('动心既是断肠'); this falling in love results inevitably in some form of pain ('断肠既是动心果'), showing love mixed feelings with sorrow or sacrifice.