John Boyer, a Ph.D. candidate specializing in medieval Aristotelian scholasticism at the University of St. Thomas, takes listeners on an enlightening journey through St. Thomas Aquinas's views on light and color. He explores the ontological importance of light in perception, referencing Aristotle's theories, and highlights contrasts with ancient thoughts on visibility and color. Boyer also discusses how these philosophical ideas have influenced our understanding of reality and perception through the lens of causal explanation.