誓言是深爱时残留的谎言
[shì yán shì shēn ài shí cán liú de huăng yán]
The phrase captures a philosophical stance towards promises or vows. In deep love, these commitments often made may become deceptive over time; hence, the user views vows through a bittersweet lens as remains of previous earnest passion now turned dishonesty. It reflects maturity about how love and promises work in reality.