”A lot of contemporary neuroscientists believe during REM sleep, the brain is involved in maintenance tasks, and it accidentally ‘kicks up dust,’ visually. At that end, dreaming is considered totally meaningless.” On the other hand he explains, “The other end is that dreaming is more substantial than waking. And we see this in ‘dream cultures,’ such as the indigenous people of Australia, who believe dreaming is intrinsic to our spiritual existence.”

Experts place these dreams into four categories.