Loose change

I’ve recently read something that describes a plot as “a completed process of  change”. I am not at all experienced or educated in writing so may well be repeating and beginning to understand basic principles but it struck me that this could be generalised to most writing, at least the kind that I’ve been involved in recently. A journal paper in a maths journal or a lighter piece in the newspaper has this property. There is a journey of sorts that starts with enticing the reader and ends with a culminating reason for the whole thing. In actual fact, the newspaper article would be in reverse (the “inverted triangle”) but I think the principle still applies. So I think there should be a change of some sort, however small, even if its in knowledge, understanding or perspective instead of an explicit lesson learnt through a character or event.