He who knows not, and knows not that he knows not, is a fool.
“-Shun him”

He who knows not, and knows that he knows not, is a child.
“-Teach him”

He who knows, and knows not that he knows, is asleep.
“-Wake him”

He who knows, and knows that he knows, is a leader.
“-Follow him”

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1. Abraham Lincoln’s Letter to Headmaster