This quote essentially compares a bigot’s mind to the pupil of an eye, stating that the more light (or knowledge, understanding, different perspectives) that is shone upon it, the more it contracts (or resists, rejects, or shrinks away). In other words, just as the pupil of the eye naturally contracts to limit the amount of light that enters, a bigot’s mind also contracts when exposed to new or differing ideas, perspectives, or information. It suggests that bigots have a tendency to become more rigid and narrow-minded when confronted with views that challenge their own, rather than opening their minds and adapting their beliefs.

The quote can be seen as a critique of close-mindedness and a call for open-mindedness, understanding, and acceptance of diversity. It highlights the importance of being receptive to new ideas and perspectives, and the danger of rejecting or resisting them without consideration.

In today’s world, this idea is highly relevant in many areas, from politics and social issues to personal relationships and individual growth. For example, in the context of social issues such as racism, sexism, or homophobia, the quote suggests that bigotry and prejudice can be perpetuated by a refusal to understand and accept different perspectives.

In terms of personal development, the quote can be seen as a reminder to remain open and receptive to new ideas, experiences, and perspectives, even (or especially) when they challenge our existing beliefs or comfort zones. It suggests that personal growth and development often require us to confront and reconsider our own prejudices and assumptions, rather than clinging to them in the face of new information or experiences. It’s a call to be adaptable, flexible, and willing to change our minds when presented with compelling reasons to do so. It’s a call to learn, grow, and evolve rather than remaining stagnant in our thinking.