A teacher can never truly teach unless he is still learning himself. The teacher who has come to the end of his subject, who has no living traffic with his knowledge but merely repeats his lesson to his students, can only load their minds, he cannot quicken them.

Acquire new knowledge whilst thinking over the old, and you may become a teacher of others.

The wisest and noblest teacher is nature itself.

I'm not a teacher: only a fellow traveler of whom you asked the way. I pointed ahead - ahead of myself as well as you.

It is the supreme art of the teacher to awaken joy in creative expression and knowledge.

Love is a better teacher than duty.