爱之所诚岂在言语情之所衷乞在容颜
[ài zhī suŏ chéng qĭ zài yán yŭ qíng zhī suŏ zhōng qĭ zài róng yán]
The sincerity of love isn't just about words; true feelings are reflected in appearance. This signifies that genuine emotions transcend verbal expression, manifesting more in physical appearance or actions instead.