To teach is to learn twice over.

Enseigner, c'est apprendre deux fois

When one teaches, two learn.

To teach is to learn.

In learning we teach and in teaching we learn.

Teach to learn. Watch yourself before you teach.

In learning you will teach, and in teaching you will learn.

Explain what you learned to someone else. Teaching forces learning.

The best way to learn something is to have to teach it.

It turns out that teaching is one of those things like raising a kid or working out—sometimes amazing, often difficult and painful, but, in hindsight, amazing.

The teacher is the lesson.

Everybody's a teacher. People can teach you two things, what to do and what not to do.

He continues to teach because it provides him with a livelihood; also because it teaches him humility, brings it home to him who he is in the world. The irony does not escape him: that the one who comes to teach learns the keenest of lessons, while those who come to learn learn nothing.

There is a theory of learning and teaching together and that is all. Results from many studies support this point of view as, also, does the evidence of commonsense. So, to be dogmatic (but with confidence) learning implies teaching and teaching implies learning. Sometimes the teacher and learner responsible for th joint process are obvious (a student at a desk and another person wearing an academic cap and gown). Sometimes, the teacher and learner are not so obviously distinct and turn out to be unexpected but, once-indicated, intuitively plausible entities.