大方廣佛華嚴經疏 18.5

18.5

Fifth, from "Sons of the Buddha, what is..." downward is the Expository Section, which is the marks of practice. Explaining these ten abidings constitutes ten sections; within each section, there is first an interrogation and then an explanation. In the explanation, there is first the clarification of its own portion, and then the clarification of superior advancement. Furthermore, the former is the station of abiding, and the latter is the initiation of practice.