“No one has yet realized the wealth of sympathy, the kindness, and generosity hidden in the soul of a child. The effort of every true education should be to unlock that treasure.”

"The Broken Heart".
The Sketch Book of Geoffrey Crayon (1819–1820)

Pure War. New York, NY, U.S.A.: Semiotext(e), 1983. p. 30

Introduction (1971)
The Golden Notebook (1962)
Context: Ideally, what should be said to every child, repeatedly, throughout his or her school life is something like this:
"You are in the process of being indoctrinated. We have not yet evolved a system of education that is not a system of indoctrination. We are sorry, but it is the best we can do. What you are being taught here is an amalgam of current prejudice and the choices of this particular culture. The slightest look at history will show how impermanent these must be. You are being taught by people who have been able to accommodate themselves to a regime of thought laid down by their predecessors. It is a self-perpetuating system. Those of you who are more robust and individual than others will be encouraged to leave and find ways of educating yourself — educating your own judgements. Those that stay must remember, always, and all the time, that they are being moulded and patterned to fit into the narrow and particular needs of this particular society."

Steps to Christ(1892), p. 94

Source: Nervous Ills their Cause and Cure (1922), p. 285

Cited in "Identifying the Wild Beast and Its Mark" http://wol.jw.org/en/wol/d/r1/lp-e/2004241?q=durant&p=par, in The Watchtower (1 March 2004)
2000s

More likely attributable to Oliver Wendell Holmes, Sr.
Misattributed

The Secret of Childhood, p. 106

Source: Prester John (1910), Ch. X