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.

Power comes not from knowledge kept but from knowledge shared.

Your most unhappy customers are your greatest source of learning.

No group and no government can properly prescribe precisely what should constitute the body of knowledge with which true education is concerned.

A smart man isn't necessarily one who knows all the answers, but knows where to find them.