This quote suggests that the survival of society relies on individuals deceiving or manipulating each other to some extent. The term "dupes" refers to individuals who are tricked or swindled. Hence, the quote implies that if everyone was completely honest and transparent, society as we know it would not last long. This is because, according to the quote, society is inherently built on people’s ability to manipulate others’ perceptions and beliefs for their own benefit.

This idea can be viewed from various perspectives. On one hand, it could be seen as a cynical view of human nature, suggesting that people are inherently deceitful. On the other hand, it might be seen as a realistic observation about the complexities of human interactions and the compromises that are often necessary for social cohesion.

In today’s world, this quote still holds relevance. For instance, in politics, leaders often use rhetoric and propaganda to sway public opinion. In business, marketing strategies often involve creating a perceived need for a product or service. Even in personal relationships, people often present themselves in a certain way to be accepted or liked by others. These are all examples of how individuals can be "dupes" in society.

As for personal development, this quote can serve as a reminder to be aware of the potential for manipulation in social interactions. It encourages critical thinking and skepticism, which are essential skills in discerning truth from falsehood. It also highlights the importance of authenticity and honesty in building healthy, sustainable relationships. At the same time, it suggests that a certain level of manipulation is inevitable in society, and thus, understanding this dynamic can help one navigate social situations more effectively.