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Marcus Tullius Cicero Quotes about Knowledge

Not only is there an art in knowing a thing, but also a certain art in teaching it.

"De Legibus (On the Laws)". Book by Marcus Tullius Cicero (Book II, Chapter 19), circa 52 BC.

Every one is least known to himself, and it is very difficult for a man to know himself.

"De Oratore (On the Orator)". Book by Marcus Tullius Cicero (Book III, Chapter 9), 55 BC.

Not to know what happened before one was born is always to be a child.

"De Oratore (On the Orator)". Book by Marcus Tullius Cicero (Chapter XXXIV), 55 BC.