"An epidemic terror of the end of the world has several times spread over the nations. The most remarkable was that which seized Christendom about the middle of the tenth century. Numbers of fanatics appeared in France, Germany, and Italy at that time, preaching that the thousand years prophesied in the Apocalypse as the term of the world’s duration were about to expire, and that the Son of Man would appear in the clouds to judge the godly and the ungodly. The delusion appears to have been discouraged by the Church, but it nevertheless spread rapidly among the people."