Anthropologists have long attempted to come to grips with Indigenous Australian sorcery beliefs and especially with the idea that acts with no understandable efficacy bring about illness and death. In this ethnographic interpretation of sorcery beliefs in the remote community of Numbulwar, I follow those few who have attempted to find a link between these apparently harmless acts and real physiological consequences, arguing that the fear of sorcery that pervades Numbulwar contributes directly to the stress of daily life and indirectly to the premature morbidity and mortality of too many lives. Belief is posited as the mechanism whereby the human stress response is activated to a harmful extent, a process in which the projection of envious feelings may often be critical.