Need Source of Quote

["Megan S. Link" <mslink@PEN.K12.VA.US>]

A teacher has asked for assistance regarding both the source
and the complete version of the following:

He who know, and knows that he knows, is wise.
He who knows, and knows not that he know, is a ...
He who knows not, and knows that he knows not, is a ...
He who knows not, and knows not that he knows not, is a fool.

Any assistance would be greatly appreciated.

Megan S. Link
Librarian
Stonewall Jackson High School
Manassas, VA
mslink@pen.k12.va.us

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