When a believer’s mind falls into passivity, many thoughts will be injected into him from outside. There will be unclean thoughts, blasphemous thoughts, and confused thoughts. They will come wave after wave through the brain. Although a person may make up his mind to reject them, he finds that he cannot stop the thoughts, nor can he change the direction and subject of his thoughts. The mind seems to be like a machine; once the switch is turned on, the machine cannot easily be stopped. The believer may use his will to oppose them, but still find that he cannot rid himself of the thoughts he does not want. Thoughts that come contrary to the believer’s will are from evil spirits.