《老子节解》与《道德经义疏》的“守一”问题
The Issue of Unity in Laozi Jie Jie and Dao De Jing Yi Shu

道教的“守一”实践论既是对先秦老庄道家的发展，又是推动成玄英重玄学思想建构的重要理论资源。而先秦道家与六朝道教的深度融合，开启于更早问世的《老子节解》的认识中。梳理揭示具有悠久历史传统的“守一”学说的独特精神气质，则是把握道教哲学的深刻演变的不可多得的时代坐标。
The Theory of Unity Practice is a further development of Daoism in the Pre-Qin Period and also influences Cheng Xuanying’s so called Chong Metaphysics. In fact, the deep merge of Daoism in the Pre-Qin Period and Daoism in the Period of Six Dynasties is already shown in earlier Laozi Jie Jie. Clarifying and revealing the distinctive spirit of the Theory of Unity Practice which has a long history, is helpful to deeply understand the evolution of Daoism.