"Failure should be our teacher, not our undertaker. Failure is delay, not defeat. It is a temporary detour, not a dead end. Failure is something we can avoid only by saying nothing, doing nothing, and being nothing."

"Nature teaches more than she preaches. There are no sermons in stones. It is easier to get a spark out of a stone than a moral."

"The most important part of teaching is to teach what it is to know."

"The most important part of teaching; to teach what it is to know."

"They teach in academies far too many things, and far too much that is useless."

"Teaching is the only major occupation of man for which we have not yet developed tools that make an average person capable of competence and performance. In teaching we rely on the "naturals," the ones who somehow know how to teach."

"The things we know best are the things we haven't been taught."

"Old age and the passage of time teach all things."

"There is none who cannot teach somebody something, and there is none so excellent but he is excelled."

"what thwarts us and demands of us the greatest effort is also what can teach us most."

“The company accountant is shy and retiring. He's shy a quarter of a million dollars. That's why he's retiring.” 

Something about teaching is curiously attractive, actually. I don't know what it is.

Plus, teaching brings home to you very fast that you actually know nothing. I didn't realize that before.

I never responded to teaching.

I used to teach dance lessons.

Teach me to hear mermaids singing,

What conscience dictates to be done, Or warns me not to do, This, teach me more than Hell to shun, That, more than Heaven pursue.

“They call it coaching but it is teaching. You do not just tell them…you show them the reasons.”

The teacher must be an actor, an artist,passionately in love with his work.

“Time, as it grows old, teaches all things.” 

I was taught that the way of progress was neither swift nor easy. 

Men of moral and intellectual distinction could scarcely agree to teach in schools where an alien attitude was forced upon them. 

“Train up a child in the way that he should go: and when he is old, he will not depart from it.”

“If you're teaching, say, physics, there's no point in persuading a student that you're right. You want to encourage them to find out what the truth is, which is probably that you're wrong.”