The quote from Robert Jordan's "The Gathering Storm" suggests that people who wield significant power often fail to use it wisely. It implies a correlation between power and a tendency towards foolish or irresponsible behavior. Those in positions of authority may neglect the responsibilities that come with their influence, leading to poor decisions that can have far-reaching consequences.
This idea reflects a common observation about leadership, where the level of wisdom or prudence does not necessarily increase with one's authority. Instead, power can amplify negative traits, creating a dangerous dynamic where the powerful act without consideration for the impact of their actions on others.