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

The real duty of man is not to extend his power or multiply his wealth beyond his needs, but to enrich and enjoy his imperishable possession: his soul.

These are not books, lumps of lifeless paper, but minds alive on the shelves.

If you do not actually like boys and girls, or young men and young women, give up teaching.

Wherever there are beginners and experts, old and young, there is some kind of learning going on, some kind of teaching. We are all pupils and we are all teachers.

The art of invective resembles the art of boxing. Very few fights are won with the straight left. It is too obvious, and it can betoo easily countered. The best punches, like the best pieces of invective in this style, are either short-arm jabs, unexpectedly rapid and deadly; or else one-two blows, where you prepare your opponent with the first hit, and then, as his face comes forward, connect with your other fist: one, two. Both are effective; but they can be administered only by a real artist, with a real wish to knock his enemy out.

Poetry is halfway between prose and music: it is sometimes like an intimate conversation, in words and phrases which need not be fully uttered, and sometimes like dancing and wordless music.