若要天荒地老必定撕心裂肺
[ruò yào tiān huāng dì lăo bì dìng sī xīn liè fèi]
This phrase suggests that true, enduring love requires an intense emotional toll or sacrifice. 'If you want eternal love, you must experience heart-rending pain.' It expresses a belief that deep, lasting relationships are only possible through significant emotional challenges.