The Spirits' Book
Book Two - The Spirit World
Chapter VIII - Emancipation of the Soul
444. How much confidence should we have for the revelations of ecstatic persons?
“Persons in an ecstatic trance may very frequently be mistaken, especially when they seek to penetrate what must remain a mystery to humankind. They then give in to their own ideas, or become the victims of deceptive spirits who take advantage of their enthusiasm to dazzle them with false visions.”