When i first read the lyrics I immediately thought of an N,N DMT. experience.
I've tried it a few times although haven't "broken through" yet...

hieroglyphs, sacred geometry are experienced in the visions...
Many people experience entities and aliens

Check out Rick Strassman's DMT the Spirit Molecule. A doctor who explored it.
Here's his experience.

http://www.dmtworld.org/showthread.php?t=813