It would be a great advantage to some schoolmasters if they would steal two hours a day from their pupils, and give their own minds the benefit of the robbery.
A high-school teacher, after all, is a person deputized by the rest of us to explain to the young what sort of world they are living in, and to defend, if possible, the part their elders are playing in it.
The first duty of a lecturer- to hand you after an hour's discourse a nugget of pure truth to wrap up between the pages of your notebooks and keep on the mantelpiece for ever.