In Joseph Conrad's "The Secret Agent: A Simple Tale," the idea of curiosity is presented as a significant aspect of self-discovery. It suggests that when a person actively seeks out knowledge and understanding, they reveal more about themselves. In contrast, someone who is consistently indifferent or uninterested in the world around them retains an element of enigma, keeping parts of their personality hidden from others.

This contrast highlights that a lack of curiosity doesn't just affect one's knowledge but also impacts interpersonal connections. An incurious individual not only misses opportunities to learn but also remains elusive, leaving others to wonder about their true thoughts and feelings. This theme underlines the importance of curiosity as a means to foster deeper human interactions and self-awareness.