"The Four Books" is a collection of four texts that form the foundation of Confucianism, a philosophical system based on the teachings of Confucius. These books include the Great Learning, the Doctrine of the Mean, the Analects, and the Mencius. They explore themes such as morality, ethics, and the importance of education in cultivating a virtuous society. Each book serves a unique purpose: the Great Learning emphasizes self-cultivation and social harmony, while the Doctrine of the Mean focuses on balance and moderation. The Analects contains sayings and ideas attributed to Confucius, and the Mencius expands on his thoughts, highlighting the innate goodness of human nature.