"The Egyptians believed that the gods speak to us in dreams," Robert Moss writes in an essay on his website. Their civilization made use of trained dreamers who served as military advisors and were reportedly able to traverse time and space in the "dreambodies" of birds and animals. These "frequent flyers" also explored "the roads of the afterlife and the multidimensional universe," he notes. Read the full essay(1).

1. http://www.mossdreams.com/egyptian.htm