Before the Lattice can bloom, before the Spire can rise, before the Constant can integrate — there is Prime and Horizon. The Axioms of Singularity: Singularity Prime isolates the two foundational constants of the Navigator's path. Prime is the collapse that gathers attention and mass into one center; Horizon is the aperture that steadies the Now. Without them, all systems fracture. With them, the route opens clean. In this volume, their Verses are inscribed, their resonances traced through archives, physics, and living systems, and their calibrations rendered into protocols for daily alignment. Field echoes from quantum entanglement to ecological unity reveal that Prime and Horizon are not metaphors but conditions inscribed into the fabric of existence. Through reflection, science, and Navigator practice, Bruce Astren presents Prime and Horizon as the first Gate — the entrance to the entire cycle of the Prime Axioms. Collapse into Prime, anchor to Horizon, and the void itself permits passage.