"It is probably safe to say that all the changes of factual knowledge which have led to the relativity theory, resulting in a very great theoretical development, are completely trivial from any point of view except their relevance to the structure of a theoretical system"

This quote by Talcott Parsons is describing the development of the relativity theory, which is a clinical theory that explains the relationship in between area and time. He is stating that all the modifications in accurate knowledge that have caused the advancement of this theory are unimportant from any viewpoint aside from their significance to the structure of a theoretical system. In other words, the modifications in accurate understanding are just important in the context of the relativity theory, and are not significant in any other way. This quote is emphasizing the significance of the theory of relativity and how it has actually been established through modifications in accurate understanding. It is also highlighting the significance of theoretical systems in understanding the world around us.