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
Isaiah	ie-ZAY-ə (English), ie-ZIE-ə (English)	English, Jewish, Biblical
DİRenÇ	-	Turkish
Shoshana	-	Hebrew
Pellegrino	-	Italian
Koppel	-	Yiddish
Diodotos	-	Ancient Greek