(Lecture delivered by Master Sheng-yen on Sunday, January 6, 1985.) The opening section of the Surangama sutra introduces two subjects that can pose problems in practice: food and sex. These form our substance and bring us into existence. Without food and sex, life would not be possible. I am often asked, "What is the difference between a householder and someone who has left home -- a monk or a nun?" Some people may think that there is not much difference between them, and in a certain sense they are right.more