Quantity of knowledge is not synonymous with quality. We can be rich in knowledge but poor in sense. Understanding is what makes sense of otherwise disparate items of information. Understanding is a worthwhile goal in that it can reduce a chaotic mental world to a more predictable and satisfying state. It also facilitates further learning and recall of knowledge and enables responses, particularly in novel situations, to be flexible and appropriate. At a time when information is cheap and access to it is easy, understanding is what makes it meaningful and manageable.