youth is wasted on the young

Etymology
Often attributed to.

Phrase

 * 1) The young fail to appreciate or make good use of what they experience.

Translations

 * Finnish: nuoruus menee hukkaan nuorissa
 * French:
 * Polish:
 * Russian: е́сли бы мо́лодость зна́ла, е́сли бы ста́рость могла́