There are two sayings by Chan Master Xuyun that I like. The first is, “Constantly, we must do Buddha activities, which are like flowers in the sky.” Buddha activities refer to practice, but how can practice be like non-existent flowers do not exist in the sky? The second saying is, “Everywhere we must build cages for practice, which are like reflections of moon on water.” The reflected moon is only an illusory image of the real moon. The meaning of this statement is that, although practice is an illusion, we still need it as a process.