“Remember this: weak character will neutralize all of the other possible good qualities a person might possess. For instance, people of high intelligence but weak character may come up with good ideas and even do a job well, but they will crumble under pressure, or they will not take too kindly to criticism, or they will think first and foremost of their own agenda, or their arrogance and annoying qualities will cause others around them to quit, harming the general environment. There are hidden costs to working with them or hiring them.”

Robert Greene, The Daily Laws (Page 182)