Schoenberg said that everything is repetition, even variation. On the other hand, we can say that repetition doesn’t exist, that two leaves of the same plant are not repetitions of each other, but are unique. Or two bricks on the building across the street are different. And when we examine them closely, we see that they are in deed different in some respect, if only in the respect of how they receive light, because they are at different points in space. In other words, repetition really has to do with how we think. And we cant think either that things are being repeated, or that they are not being repeated. If we think that they are being repeated, it is generally because we don’t pay attention to all of the details. But if we pay attention as though we were looking through a microscope to all of the details, we see that there is no such thing as repetition. 

John Cage