The drops in the river of perceptions intermingled and influenced each other in their process of birth, existence, and death. If one’s perceptions were accurate, reality revealed itself with ease; but if one’s perceptions were erroneous, reality was veiled. People were caught in endless suffering because of their erroneous perceptions: they believed that which is impermanent is permanent, that which is without self contains self, that which has no birth and death has birth and death, and they divided that which is inseparable into parts.