Abstract

John Lewis and Thomas Aquinas may seem like an unusual pairing for an essay. The first was a modern American congressman and civil rights activist, and the second was a priest, philosopher, and theologian from medieval Italy. Differences notwithstanding, their worldviews share a remarkable degree of overlap. This paper explores how each of these figures describes the development of right judgment and thus serves modern audiences seeking to understand how reason, emotion, and virtue operate in moral decision-making. Bringing them together, the author examines methods for rightly developing practical moral knowledge. Lewis’s political influence is studied theologically for how social formation, individual agency, and collective action function in perceiving and implementing natural law. Aquinas provides a theoretical framework for comprehending these concepts, by first defining synderesis and conscience, then discussing ways of knowing natural law, and, finally, explaining the virtue of prudence.