4 Degrees

Maynard James Keenan urges the listener to "let go" and embrace a higher state of being. The title "4 Degrees" is often thought to refer to the slight temperature difference that can change one's state of mind or comfort.

"You won't feel me until you lock me in
Let this be"

It's about breaking down barriers—whether they are guilt, shame, or fear—to experience true connection or enlightenment.

Some interpretations suggest a cruder meaning related to anal sex, as the anal canal is reportedly 4 degrees warmer than the rest of the body. Given Tool's history of double entendres, it likely serves as a metaphor for vulnerability and opening up one's most guarded self.

The track features Adam Jones's signature heavy yet melodic guitar work and Danny Carey's complex drumming, creating a trance-like atmosphere that pulls the listener deeper into the "undertow."