Final answer:
Postman means that having dreams and fantasies is not a problem, but it becomes an issue when we become too attached to them and neglect reality.
Step-by-step explanation:
When Postman says there's nothing wrong with building castles in the air, he means that it is not a problem to have dreams, aspirations, or imaginative thoughts. This is a metaphorical expression that suggests it is natural and human to have dreams and fantasies.
However, the problems arise when we try to live in these castles in the air. This means that when we become too attached to our fantasies and neglect the realities of life, it can lead to disappointment, frustration, and a lack of practicality.
For example, if someone dreams of becoming a famous musician but doesn't put in the necessary effort and practice, they may never achieve their goal and end up feeling unfulfilled.
Learn more about the importance of balancing dreams and reality