The Great Learning (Traditional Chinese: 大學, Simplified: 大学, Pinyin: Dàxué, Korean: 대학, Japanese: 大学, Vietnamese: Đại Học) is one of the Four Books (Great Learning, Doctrine of the Mean, Analects, Mencius) of Confucianism. The text consists of a short main text attributed to Confucius (孔子) and ten commentary chapters attributed to Zengzi (曾子) the disciple of Confucius. The translation also includes interspersed notes by the 12th-century philosopher Zhu Xi (朱熹). Zhu Xi's master Cheng Yi (程颐) says, "The Great Learning is a Book transmitted by the Confucian School, and forms the gate by which first learners enter into virtue. That we can now perceive the order in which the ancients pursued their learning is solely owing to the preservation of this work, the Analects and Mencius coming after it. Learners must commence their course with this, and then it may be hoped they will be kept from error."