Who said "The mind is not a book to be written on and left blank."?

This quote is attributed to Dumbledore.

The mind is not a book to be written on and left blank. - Dumbledore

"The mind is not a book to be written on and left blank."

Dumbledore Education

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

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

"It does not do to dwell on dreams and forget to live."

"The truth is a beautiful and terrible thing, and should therefore be treated with great caution."

"Education opens doors."

"Education opens doors to endless possibilities."

"I ain't got the education you got, bub."

"You can't put a price on history."