The quote "See the TURTLE, ain't he keen? All things serve the fuckin Beam" from Stephen King's book "The Waste Lands," highlights the connection between various elements in the universe and the central concept of the Beam, which is a metaphorical force that binds and directs existence. The turtle symbolizes wisdom and endurance, embodying the idea that all creatures and entities have a role in the greater balance of reality.

This line illustrates the theme of interconnectedness pervasive throughout King's Dark Tower series, where the characters encounter diverse beings and forces that all contribute to the struggle against chaos. It emphasizes the notion that every element, regardless of its nature, serves a purpose in the ongoing battle for balance and order in the universe.