A teacher must believe in the value and interest of his subject as a doctor believes in health.
The relation between parents and children is essentially based on 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.
If you do not actually like boys and girls, or young men and young women, give up teaching.
A very wise old teacher once said: I consider a day's teaching wasted if we do not all have one hearty laugh.
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.