According to Brooks, Diminisher refers to an individual who diminishes others by making them feel small and unseen. This term characterizes people who view others as objects to be used, rather than recognizing them as individuals to be befriended. Diminishers engage in stereotyping, ignore others, and are often self-centered, preventing them from truly seeing and understanding those around them. Brooks uses the concept of Diminishers to highlight the destructive impact of such behaviors on interpersonal relationships, emphasizing the need for a more empathetic and intentional approach to seeing others deeply within the context of the book.

An Illuminator is a person who illuminates and uplifts others, fostering a sense of recognition and understanding. The term stands in contrast to the Diminisher, representing someone who makes others feel small. An Illuminator is characterized by being present, faithful, and understanding, celebrating achievements and acknowledging strengths while navigating challenges. Within the book, Brooks employs the concept of the Illuminator to underscore the positive impact of individuals who engage in meaningful, empathetic interactions, emphasizing the importance of social connection and generosity in cultivating strong moral character.