* You don't understand anything until you learn it more than one way.
* You don't understand anything until you learn it more than one way.
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* The playfulness of childhood is the most demanding teacher we have.
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In Rebecca Herold, ''Managing an Information Security and Privacy Awareness and Training Program'' (2005), 101.
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* We like to think that a child's play is unconstrained—but when children appear to feel joyous and free, this may merely hide from their minds their purposefulness; you can see this more clearly when you attempt to drag them away from their chosen tasks. For they are exploring their worlds to see what's there, making explanations of what those things are, and imagining what else could be; exploring, explaining and learning are among a child's most purposeful urges and goals. The playfulness of childhood is the most demanding teacher we have. Never again in those children's lives will anything drive them to work so hard.