The quote “That rule is the better which is exercised over better subjects” suggests that the effectiveness of a rule or law is not just determined by its intrinsic quality, but also by the people it is intended to govern. If the subjects of the rule are virtuous, understanding, and willing to abide by it, the rule will be more successful and beneficial.

In essence, this quote emphasizes the importance of the quality of people in a society or group in determining the success of its governance. It implies that the best governance is one that is exercised over people who are morally upright, educated, and law-abiding.

Applying this to today’s world, the quote can be interpreted to mean that laws and policies will be more effective in societies where people are educated, aware, and willing to comply for the greater good. For example, public health policies such as vaccination programs or mask mandates during a pandemic will be more effective in societies where people understand the importance of these measures and are willing to comply, rather than in societies where misinformation and resistance are rampant.

In terms of personal development, this quote can be seen as a reminder of the importance of self-improvement and personal growth. Just as a rule is more effective when applied to ‘better’ subjects, we can become ‘better’ subjects ourselves by striving to improve our knowledge, skills, and moral character. This can make us more effective in our personal and professional lives, as we will be better equipped to understand and navigate the ‘rules’ or challenges that we encounter.