In the olden times the existence of devils was universally admitted. The
people had no doubt upon that subject, and from such belief it followed
as a matter of course, that a person, in order to vanquish these devils,
had either to be a god, or to be assisted by one. All founders of
religions have established their claims to divine origin by controlling
evil spirits, and suspending the laws of nature. Casting out devils was
a certificate of divinity. A prophet, unable to cope with the powers of
darkness, was regarded with contempt. The utterance of the highest and
noblest sentiments, the most blameless and holy life, commanded but
little respect, unless accompanied by power to work miracles and command
spirits.