This section of the Summa Theologica, known as 'Prima Secundae,' is a treatise on the nature of habits, virtues, and vices. It explores the development of these aspects within human beings and their impact on moral conduct. Aquinas delves into the essence of habit, its relationship to intentionality, and its classification into virtues and vices. He elaborates on various virtues, such as faith, hope, and charity, examining their sources, manifestations, and impact on the soul. Conversely, he analyzes vices like pride, envy, and anger, exploring their origins, effects, and the means to combat them. The text delves into the interplay of reason, will, and divine grace in shaping moral character and attaining virtue. It explores the significance of virtuous actions in achieving a life of holiness and fulfilling one's ultimate purpose. This section of the Summa Theologica offers a foundational framework for understanding the ethical dimension of human existence, providing valuable insights into the nature of virtue, vice, and the cultivation of moral excellence.