Think Outside The Box?

Everyone says to "think outside the box", but that may not be true. Essentially, people (mostly teachers and professors)think of a box as mandatory knowledge and the outside of it to be extra stuff, abstract things that are connected to the subject in question, but not exactly in the directed course of learning. A more scientific definition for the phrase "think outside the box" is actually think outside the bag. A bag is a flexible thing, something not entirely fixed, whereas a box is once it's full, it's full and nothing else is going to fit into it. A bag you can jam just about anything in to the breaking point. What this means in more metaphorical terms is that once you're done learning the basics, it's done, full, complete; or you could have a bag in which you can fit more and more things into as time goes by, but still in both cases it is still possible to think outside of the object in question. So the next time yo start to say "think outside the box",think back and wonder if the topic in question is one on which knowledge can keep on being added as time goes by.