乍见之欢怎比久处不厌
[zhà jiàn zhī huān zĕn bĭ jiŭ chŭ bù yàn]
"Joy at First Sight cannot Compare with Unwearied Admiration after Long Stay" means that while the thrill of new acquaintance is delightful, a deeper joy comes through prolonged interaction that doesn't tire either party, indicating a value of substance over fleeting attraction.