
The reason why this rule is so important is because it provides guides that you can use to create reference points when composing a shot. Those reference points allow our brains to focus more upon an image that is balanced appropriately.
Additionally, having a balanced image gives you eyes more roam which in return creates a more interesting and appealing look to your shot. If you do some research you will find that many objects in a shot, other than the main subject, can be found directly under the intersection points or "power points" of the intersection.
A shot that is composed using the four points where the intersections come together creates some of the most compelling shots. This is a simple way to instantly create shots that appeal more to the eye rather than simply centering your subject.







