Who said "Youth is wasted on the young, as they say."?

This quote is attributed to Albus Dumbledore.

Youth is wasted on the young, as they say. - Albus Dumbledore

"Youth is wasted on the young, as they say."

Albus Dumbledore

Character in Harry Potter and the Half-Blood Prince

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"It is our choices that show what we truly are, far more than our abilities."

"Dark and difficult times lie ahead. Soon we must all face the choice between what is right and what is easy."

"Understanding is the first step to acceptance, and only with acceptance can there be recovery."

"Happiness can be found even in the darkest of times, if one only remembers to turn on the light."