ANSWER:

This person is a soothsayer and one must stay away from all what he says. 

There is one man Medical medium in internet. He sells books on how to treat diseases, chronic illness through food only like drinking celery juice etc eating what not. But one downside is he claims he talks to one spirit that helps him in putting health advise. Is it wise to buy book from this man eventhough his books contain only diet information. ?