The quote reflects the idea that while self-doubt can be considered a luxury, the pursuit of understanding oneself and one's experiences is essential. It suggests that people often struggle with their doubts and insecurities, which can prevent them from truly examining their lives. This process of self-examination, while challenging, is portrayed as the most fulfilling way to live.
In essence, the examined life requires courage and introspection, urging individuals to confront their thoughts and feelings rather than ignoring them. The author highlights that despite the difficulties that may arise from this journey of self-discovery, it is ultimately what brings meaning and value to life.