" Every judgement of conscience, be it right or wrong, be it about things evil in themselves or morally indifferent, is obligatory, in such wise that he who acts against his conscience always sins. "
- Thomas Aquinas

In simple terms, this statement from Thomas Aquinas suggests that people are morally obligated to follow their conscience when making decisions, regardless of whether those decisions pertain to inherently evil actions or morally neutral choices. According to Aquinas, acting against one's conscience is considered a sin, even if the action itself might not be objectively wrong.

To delve deeper into this quote, it highlights the profound role that individual moral judgment plays in ethical decision-making. It underscores the importance of personal integrity and self-reflection when making choices. However, it also raises questions about the reliability of one's conscience. Aquinas suggests a sense of responsibility towards one’s internal guidance system, but he does not absolve individuals from seeking wisdom or counsel to refine their understanding of what is right or wrong. This nuanced perspective challenges readers to consider how they can best align their actions with genuine moral principles while recognizing the limitations and potential fallibility of conscience.

Thomas Aquinas was a prominent medieval philosopher and theologian whose work has greatly influenced Western Christian thought, particularly in areas like ethics and metaphysics. His writings often aim to reconcile philosophical reasoning with religious doctrine, making him one of the most significant figures in the history of Catholic theology and philosophy.