 Nichiren invokes the fear of natural disasters, famine and plague and quotes from a variety of Buddhist sutras to demonstrate that the reason for such problems is the failure of the sovereign to embrace the correct religious doctrine.He attacks the Pure Land school of Hōnen as a sinister cult (邪宗 "jashū") and emphasizes the need to reject such false doctrines and place one's faith in the "Lotus Sutra".Nichiren also predicted a foreign invasion, which a prediction which came true more than a decade later when Japan was invaded by the forces of Kublai Khan.