(Lecture given by Master Sheng-yen on the Surangama Sutra on January 1, 1989.) Purnamaitrayaniputra, one of Buddha's disciples, seeks to understand the difference between the Buddha's mind and that of ordinary sentient beings. He approaches this problem by asking the Buddha about the four elements: earth, water, fire and wind. He recognizes that these elements are mutually destructive. How can fire and water, for example, and the principles underlying them, exist together in the universe?more