Another credible evangelical is the author Os Guinness. He tells the following story:
Speaking once at Essex University, I saw sitting in the front row a strange-looking girl with an odd expression on her face. Remembering an incident the previous night when a radical had tried to disrupt the lecture, I spoke on but also prayed silently that she would create no trouble. She remained quiet the whole evening but came up as soon as it was finished with a troubled look and asked me what spell I had cast to keep her quiet. She told me she was part of a spiritist circle in the South of England and that the spirits had ordered her to travel to Essex, where she had never been before, to disrupt a series of lectures beginning that week. The curious sequel to this was that when I arrived back in Switzerland someone else in the community (of which Guinness was a part), [a person who was] far from [being] a fanciful visionary, asked me what had happened in the Essex lectures. Praying for them one morning, she had seen a vision, as real as waking reality, of the lecture hall and the strange girl about to disrupt the meeting. Having prayed for her, she was convinced that nothing had happened, but she wondered if it was just her imagination. The presence of a Christian praying in the power of the Holy Spirit is always enough to render the occult inoperable.