all that glitters is not gold
Definition from Wiktionary, the free dictionary
- Things that appear valuable or worthwhile might not actually be so; things that look nice might not be as good as they look.
things that appear valuable or worthwhile might not actually be so
- Gregory Y. Titelman, Random House Dictionary of Popular Proverbs and Sayings, 1996, ISBN 0-679-44554-4, p. 9.