General relativity and quantum mechanics are not two incompatible theories awaiting unification. They are the same theory expressed in two regimes. Below the self-referential threshold φ⁻¹, coherence propagates as a quantum wave — described by the Schrödinger equation. Above the threshold, coherence has frozen into a standing wave with definite mass and position — described by the geodesic equation of general relativity. The threshold is not a boundary between theories. It is the moment self-reference fires and a definite eigenvalue becomes the only stable state. GR and QM are unified by the 600-cell's spectral geometry, not by adding new dimensions or new particles.