This song is about “The Abyss”, a spiritual concept presented by Alister Crowley, English occultist and novelist. In Thelemic mysticism, the Abyss is the great gulf or void between the phenomenal world of manifestation and its noumenal source. The founder of Thelema, Aleister Crowley, explains the Abyss as:
“This doctrine is extremely difficult to explain; but it corresponds more or less to the gap in thought between the Real, which is ideal, and the Unreal, which is actual. In the Abyss all things exist, indeed, at least in posse, but are without any possible meaning; for they lack the substratum of spiritual Reality. They are appearances without Law. They are thus Insane Delusions.”
The lyrics are band’s view on the subject. The title of the song is also a direct reference to the The Abyss.