some say lucid dreams and OBE's are 'spiritual journeys' to other realms of existence where you can access you past life records, talk to other dreamers or astral beings, or learn from your very own spirit guide.

Others say its all in your head. . .

I ask, whats more amazing? The fact that you are traversing different universes of existance. . .or the fact that these unimaginably vast, detailed, spiritually significant episodes are created right inside your own brain.
so lets get philosophical and spiritual all at once and think about this little quandary a bit.