Spirit and Personality is a seminal philosophical work by modern Chinese educator Cai Yuanpei, focusing on spiritual cultivation and the perfection of human character. Blending Confucian traditions with Western humanism, Cai argues that education should aim not merely at knowledge acquisition, but at fostering holistic personality and independent thinking. He highlights the pivotal role of aesthetic education in character-building, asserting that only through integrating art with moral instruction can we cultivate "complete individuals." The book embodies Cai's principle of "freedom of thought, inclusiveness," profoundly influencing China's 20th-century educational reforms.