Do you know the ball flight laws? Do you even know what a ball flight law is? Do you believe in the old ball flight laws, or the new ones?
Ball flight laws are simply the physical laws which determine why and how a ball flies through the air. They can tell you what a ball will do in terms of height, trajectory, distance, direction and curvature (and more). They are literally the ultimate goal in golf.
This is some of the most important information you will ever learn. What can be more important that correctly diagnosing why the hell your ball flew into the trees on the left. Without the correct diagnosis, you are not going to make the correct fix. Whilst a blind squirrel occasionally finds a nut, you would be much better off to know this stuff.
Check out this great article from Adam Young Golf breaking down the Ball Flight Laws.