The Spiritual Gravity Model (SGM) is a conceptual-structural diagnostic framework for understanding the psycho-spiritual condition of finite human consciousness under irreversible time. It constitutes the third pillar of the author’s Cosmic Trilogy, alongside the t = ∞ Time Ocean Model (TOM) and Cosmic Economics (CE). Throughout the series, concepts drawn from entropy theory, information theory, non-equilibrium thermodynamics, and gravitational physics are used strictly as structural analogies. They function heuristically to reveal formal resemblances between physical systems and the architecture of human meaning, coherence, and existential disorder — without any claim to literal physical identity or quantitative prediction. This record forms part of the five-paper SGM series: 1. SGM I — Psycho-Spiritual Entropy and Human Need for Meaning: The Problem of Finite Consciousness Before Existence (Introduces psycho-spiritual entropy (Sψ) as a diagnostic category and establishes the methodological foundation.) 2. SGM II — The Historical Formation and Function of Meaning Gravity: Religion as a Low-Entropy Structure (Analyses the Axial Age construction of transcendent low-entropy frameworks and the civilisational transmission chain that sustains them.) 3. SGM III — The Weakening and Crisis of Modern Meaning Gravity: Attention Fragmentation, Algorithmic Disruption, and the Structural Erosion of Coherence (Examines the three modern mechanisms eroding meaning gravity and develops the CE–TOM–SGM diagnostic closed loop, drawing a structural analogy with critical transitions in complex systems.) 4. SGM IV — The Rise of Politics and the Capture of Sacred Gravity: Power, Ideology, and the Substitution of the Transcendent Centre (Demonstrates the structural tendency of political power to perform gravitational hijacking of the vacated transcendent centre, producing forced synchronisation and metastable false-vacuum configurations.) 5. SGM V — Time-Mark and the Sovereign Choice: Human Beings as Finite Observers (Completes the diagnostic arc by shifting to the existential situation of the finite observer: the structural silence of the universe as precondition for sovereign choice, time-marking as irreversible causal inscription, and the ethical demand of low-entropy commitment under conditions of unknowable tipping points.) Author: Wai-Hung Tam (Pan) Independent Researcher, Hong Kong Email: panxtam@protonmail.com The framework engages neighbouring traditions in conceptual social philosophy, including Charles Taylor’s A Secular Age, Alasdair MacIntyre’s After Virtue, and Eric Voegelin’s The New Science of Politics, while maintaining its own distinct structural-analogical method.