The quote highlights the profound impact that being a policeman has on a person's mindset. It suggests that the role inherently distorts one's perception and leads to a loss of trust in humanity. This skepticism is described as a departure from a naturally cheerful disposition, which is crucial for a person to be endearing and charming. The suggestion is that the profession of policing demands a certain kind of hardening, making it challenging to maintain a positive, trusting view of the world.

The author, P.G. Wodehouse, implies that this transformation is unavoidable for those in the profession. The weight of constant exposure to crime and human fallibility seems to overshadow the innate optimism a person might otherwise possess. This commentary not only examines the psychological toll of police work but also reflects on broader themes of human nature and our capacity for trust and friendship in the face of adversity.