“A good teacher teaches what he has been taught. A wise one teaches what he has learned”

“A wise teacher learns in the midst of teaching; a wise student teaches in the midst of learning.”

“A teacher will be frustrated if she is only motivated to teach what she has learned. Yet, if she is motivated because of the students, then she will learn from them how to teach.”

“...No one teaches well unless he has first learned well; no one learns well unless he learns in order to teach. And both learning and teaching are vain and unprofitable unless accompanied by practice.”

“Suffering has been stronger than all other teaching, and has taught me to understand what your heart used to be.”

“How teach again, however, what has been taught correctly and incorrectly learned a thousand thousand times, throughout the millenniums of mankind's prudent folly? That is the hero's ultimate difficult task.”