That's where nature and nightmare come merge
Where you hold in so much inside, ya gotta splurge

from GZA – Knock, Knock Lyrics on Rap Genius

Meaning

Continuing with the theme of GZA as a “dark ignition” he is saying that he is both nature and nightmare; real and not real. GZA has such a scope of things inside of him that he has to splurge and make a lot of music.

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