Lu Jiuyuan (; 1139–1192), or Lu Xiangshan (陸象山; Lù Xiàngshān), was a Chinese philosopher and writer who founded the school of the universal mind, the second most influential Neo-Confucian school. He was a contemporary and the main rival of Zhu Xi. In East Asia and the Western World, he is known by his honorific name rather than his private name. Lu Jiuyuan's Main Ideas Lu's Philosophy of the Mind: Unity of the Mind and the Way In his own words, Lu said, "The universe is my mind, and my mind is the universe." Unlike Zhu's emphasis of li, which is the principle that contains and underlies all things and beings, Lu brought forward the concept of the heart/mind as the ultimate one or source that encompasses everything including the universe and the principle. The unity of the mind expressed in the work of Lu means that the mind of humanity and the mind of the Way (Dao) are one and the same. This is in direct opposition to Zhu Xi's idea that the mind of Humanity and the mind of the Way are separate and distinct from each other. Zhu Xi also claimed that every individual thing possesses its own unique material force (qi) distinct from the principle (li). Lu vehemently opposed this dualistic doctrine and further emphasized that everything is connected and originated from the heart/mind. Original Mind The concept of original mind was first conceived by Mencius but was further developed by Lu. The original mind means that all human beings are born with innate moral knowledge and virtue. This original mind is fourfold as Mencius called them 'four roots of the heart': Compassion - The root of humaneness (ren). Shame - The root of righteousness (yi). Respect - The root of propriety and ritual observance (li). Knowledge of right and wrong - The root of wisdom (zhi). Like real roots in nature these four roots must be nurtured first before flowers to bloom. So, in other words, these four roots of the heart are nothing but just tendencies of the mind. These four roots of the heart need proper nurturing and care to grow strong and healthy to manifest their true nature, which is moral virtue. Lu believed that moral virtues are innately present in the human heart/mind and that, endowed by Heaven, humaneness and righteousness form the Original Mind of human beings. The original mind is