I remember a moralizing poem I wrote in elementary school. I don't think it was an assignment -- I just liked moralizing poems. Actually all I remember is that the poem was about "Old Mrs. Mudrock" (I had no idea of what plausible names were back then), and two lines introducing the moral of the poem:
Old Mrs. Mudrock thought of something new.
In this world, her views were held by few.
I think she was a good person, discovering that the world was not as honest or reliable as she was, but it might be that she was a selfish person who needed to be taught a lesson.
I think it's interesting that I remember those two lines, almost certainly because In this world is metrically bad. I kind of new it at the time, but couldn't figure out how to solve it. It's funny that it's the metrical solecism that made it stick out in my memory, in contrast to the usual idea that metrical regularity helps with memorization.