All that glitters is not gold
(重定向自All that glisters is not gold)

All that glitters is not gold is a well-known saying, meaning that not everything that looks precious or true turns out to be so. This can apply to people, places, or things that promise to be more than they really are. The expression, in various forms, originated in or before the 12th century and may date back to Aesop. The Latin is Non omne quod nitet aurum est.