"The Republic" is a philosophical text that explores the concepts of justice, order, and character within the context of a just city-state and a just individual. It presents the idea of a utopian society ruled by philosopher-kings, who are the most wise and just. The dialogue also delves into theories of education, the nature of reality, and the role of the philosopher in society. It is a fundamental work in Western philosophy and political theory.

"De Anima" is a foundational philosophical treatise that explores the concept of the soul and its relation to the body. The work delves into the nature of life itself, categorizing different kinds of souls possessed by different kinds of living things, such as plants, animals, and humans. It discusses the faculties of the soul, including the nutritive, perceptive, and intellectual aspects, and investigates their functions and interactions. The treatise also examines issues of perception, cognition, and memory, arguing that the soul is the principle of life and the source of all vital functions, ultimately aiming to define the essence of life and the basis of all living activities.