At certain times and in certain schools it is orthodox to be a rebel; and in general it is a very poor class that does not contain at least three pupils who can be counted on to oppose the teachers authority and loudly and persistently to question everything he says.

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.

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.

A good teacher is a determined person

The wise teacher knows that 55 minutes of work plus 5 minutes laughter are worth twice as much as 60 minutes of unvaried work.

Many people have played themselves to death. Many people have eaten and drunk themselves to death. Nobody ever thought himself to death.

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