But, in order to make the supposition answer my purpose, I must add two other cases.

I will imagine that one of these boys is called away a few minutes, and leaves his paper on his desk, and that another boy, of an ill-natured and morose disposition, happening to pass by and see his paper, thinks he will sit down and write upon it a few lines, just to tease and vex the one who was called away.

We will also suppose that I call another boy to me, who I have reason to believe is a sincere Christian, and say to him, 'Here is a new duty for you to perform this afternoon.

This piece of poetry is to be copied; now do it carefully and faithfully.

You know that this morning you committed yourself to God's care during the day; now remember that he has been watching you all the time thus far, and that he will be noticing you all the time you are doing this; he will be pleased if you do your duty faithfully.' "The boys thus all go to writing.