wheel within a wheel

Something that is very complex and perhaps overly complicated. The phrase originated in the Bible. I can't figure out how to turn off this alarm system—it's really a wheel within a wheel.

Common Names:

Name	Pronounced	Usage
Debbi	DEB-ee	English
Gilad	-	Hebrew, Biblical Hebrew
Atse	-	Frisian
ZuriÑE	-	Basque
Eloy	e-LOI	Spanish
Anika (1)	AH-nee-kah (German)	German, Dutch, Danish, Slovene