Know the subject; love the subject; like your students; know your students.

History is a strange experience. The world is quite small now; but history is large and deep. Sometimes you can go much farther by sitting in your own home and reading a book of history, than by getting onto a ship or an airplane and traveling a thousand miles.

A teacher must believe in the value and interest of his subject as a doctor believes in health.

These are not books, lumps of lifeless paper, but minds alive on the shelves. From each of them goes out its own voice... and just as the touch of a button on our set will fill the room with music, so by taking down one of these volumes and opening it, one can call into range the voice of a man far distant in time and space, and hear him speaking to us, mind to mind, heart to heart.

Bad teaching wastes a great deal of effort, and spoils many lives which might have been full of energy and happiness.

You [the teacher] do not merely insert a lot of facts, if you teach them [the students] properly. It is not like injecting 500 cc. of serum, or administering a year's dose of vitamins.

Language is a living thing. We can feel it changing. Parts of it become old: they drop off and are forgotten. New pieces bud out, spread into leaves, and become big branches, proliferating.