Grasping the structure of a subject is understanding it in a way that permits many other things to be related to it meaningfully. To learn structure in short, is to learn how things are related.
Jerome BrunerThe shrewd guess, the fertile hypothesis, the courageous leap to a tentative conclusion - these are the most valuable coins of the thinker at work. But in most schools guessing is heavily penalized and is associated somehow with laziness.
Jerome Bruner