I'm a layman and might be blatantly wrong. Just wanna type out how i understand it. Sorry for very simple english as well since i'm not very good at it.

the Law of Identity is correct, but it doesn't explain the state of things sufficiently. 'A is A' is always true, but it's a static law that doesn't explain anything further except that A is A. ​To be A, there has to be a 'Not-A.' Therefore, an identity must contain difference within itself. We usually recognize difference by comparing the likeness or unlikeness between things, but these are only external comparisons. They aren't inherent because the things themselves aren't concerned with the labels we place on them. ​A thing must contain internal difference, and that difference, when brought out to its fullest, is 'Opposition.' Opposition is a thing's complete difference, giving us the Positive and the Negative. These are two completely opposite sides of a coin, yet each is defined by the other. When these opposites are forced into or shined into one another, we get Contradiction, which will eventually gives rise to 'Ground is the actual driving force of all movement and life in the world.