"Yes sir, but I have forgotten."
"Well, I have forgotten too. I have a great many classes to hear, and of course a great many lessons to assign, and I never remember them; it is not necessary far me to remember."
"May I speak to one of the class, to ask about it?"
"You cannot speak, you know, till the Study Card is down; you may, then."
"But I want to get my lesson now."
"I don't know what you will do, then: I am sorry you don't remember."
"Besides," continues the teacher, looking pleasantly, however, while he says it, "if I knew, I think I ought not to tell you."
"Why, sir?"
"Because, you know, I have said I wish the scholars to remember where the lessons are, and not come to me. You know it would be very unwise for me, after assigning a lesson in the class, to spend my time in telling the individuals over again here. Now if I should tell you, I should have to tell others, and thus adopt a practice, which I have condemned."
Take another case. You assign to a class of little girls a subject of composition, requesting them to copy their writing upon a sheet of paper, leaving a margin an inch wide at the top, and one of half an inch at the sides and bottom. The class take their seats, and, after a short time, one of them comes to you, saying she does not know how long an inch is.