This quote implies that a ruler (or any leader) should always be aware of and consider the views and feelings of the people they govern. The “thermometer” metaphor suggests that public opinion is a measure of the social and political climate. Just as a thermometer gauges temperature, public opinion gauges the mood, attitudes, and sentiments of the population. If the temperature is too high or too low, it indicates a problem; similarly, if public opinion is strongly negative or even overly positive, it signals that the leader needs to address certain issues or maintain certain policies.

In the context of a monarchy, where the ruler often has absolute power, this quote underscores the importance of not ruling in a vacuum, but rather taking into account the needs, desires, and perspectives of the people. Ignoring public opinion can lead to unrest, rebellion, or revolution, while being attuned to it can help maintain stability and harmony.

In today’s world, this concept is applicable not only to political leaders but also to business leaders, educators, and other individuals in positions of authority. For example, a CEO needs to be aware of the opinions of their employees, customers, and shareholders; a teacher needs to understand the perspectives of their students; a parent needs to listen to the feelings of their children. Ignoring these “thermometers” can lead to dissatisfaction, disengagement, or conflict, while paying attention to them can foster understanding, cooperation, and success.

In terms of personal development, this quote emphasizes the importance of empathy, listening, and responsiveness. It suggests that to grow as individuals and to succeed in our personal and professional relationships, we need to be aware of and considerate of the feelings and perspectives of others. We need to consult our own “thermometers”—our friends, family, colleagues, and even our own introspection—to understand how our actions and attitudes are perceived and received, and to make necessary adjustments.