有一种执着叫无可取代有一种动摇叫可有可无
[yŏu yī zhŏng zhí zhe jiào wú kĕ qŭ dài yŏu yī zhŏng dòng yáo jiào kĕ yŏu kĕ wú]
It reflects two opposite feelings. One is unwavering conviction and loyalty in a relationship that cannot be substituted; while the other refers to something trivial and dispensable, which can easily be let go or replaced without significant consequences.