In all the works on pedagogy that ever I read — and they have been many, big, and heavy — I don't remember that any one has advocated a system of teaching by practical jokes, mostly cruel. That, however, describes the method of our great teacher, Experience. She says
Notes from Wikiquote
And I'll give you something to make you wise | and thereupon she keeps her promise, and seems to take her pay in the fun of tormenting us. | Lecture II : The Universal Categories, § 2 : Struggle, CP 5.51