"For to change the norms, the very foci of attention, of a cultural system is a difficult task - far more complex than that of changing an individual's attitudes and interests"

This quote by James S. Coleman is referring to the difficulty of altering the standards of a cultural system. He is recommending that it is a lot more complicated to alter the standards of a cultural system than it is to alter an individual's mindsets and interests. This is because the standards of a cultural system are the accepted requirements of behavior and beliefs that are shared by a group of individuals. Changing these standards requires a collective effort and can be difficult to attain. It requires a shift in the focus of attention of the entire group, which can be an uphill struggle. Therefore, Coleman is stressing the intricacy of changing the standards of a cultural system compared to changing an individual's mindsets and interests.