Portal,
I didn't suggest that the imagination necessarily belonged to the person that we may be speaking to. The dreams, revelations, or nightmares may well have originated in the mind of someone long since dead. Since in many cases it was personally profitable to "know Gods will" these phenomena tended to be perpetuated.
So as an Athiest I personally have given up denying the existence of any gods. In the mind of the pious they are just as real as the trees that I imagine, through my perceptions, grow outside my window.
The difficulty arises when the pious have perceptions that cannot be shown to exist for others. It is probably impossible to persuade a mind that sees a divinity or a divine purpose any more than you are likely to persuade me that the trees outside the window are figments of my imagination.
Personally I tend to regard religiosity as a mental or educational problem, and usually try to regard it as a quirk of personality. This is not always possible and when a persons imaginary world begins to infringe upon mine then we have a problem. Like Iraq and WWII. Palestine and Israel. India and Pakistan. Serbia and Bosnia.
I do feel guilty however, when I think of the human potential that is lost and that I am not doing anything much about it. A person that is forced to go through life as a sinner, hoping for salvation. A woman forced into virtual slavery because of her sex. Persons removed from society because they prefer the companionship of physically similar people. The waste is awful, the pain and misery as real as reality can be, the stealing and lying (on the part of the religious hierarchy) corrupts our people, our governments, and even makes the word "honorable" suspicious.
I guess the guilt is my problem
Best, M