许一世天荒地老换此生柔情似水
[xŭ yī shì tiān huāng dì lăo huàn cĭ shēng róu qíng sì shuĭ]
Promise eternal oblivion to exchange this life's tender affection. This is quite a romantic expression indicating the willingness to endure hardships or changes over a lifetime for endless, soft affection in this life.