"But the scientific importance of a change in knowledge of fact consists precisely in j its having consequences for a system of theory"

This quote by Talcott Parsons is stressing the significance of clinical understanding and its implications for a system of theory. He is recommending that when a modification in knowledge of reality happens, it has a significant effect on the system of theory. This is since the modification in understanding of truth can result in a shift in the method the system of theory is comprehended and interpreted. For instance, if a new discovery is made that opposes a formerly accepted theory, then the system of theory must be adjusted to accommodate the new understanding. This is why it is necessary to be familiar with modifications in understanding of truth, as they can have a considerable influence on the system of theory. In conclusion, Talcott Parsons is emphasizing the significance of clinical knowledge and its ramifications for a system of theory.