The one exclusive sign of thorough knowledge is the power of teaching.

The value of a teacher

Aristotle

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2165 The roots of education are bitter,but the fruit is sweet
655 Happiness depends upon ourselves
1650 Happiness depends upon us
594 A FRIEND TO ALL IS A FRIEND TO NONE
2171 “I've got a stele we can use. Who wants to do me?" "A regrettable choice of words," muttered Magnus.”

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