The Yoga of the Inner Body: a phenomenological exploration of subtle somatic signs and their vibratory nature

Contemplative traditions recognize two inner perceptual pathways: the Yoga of Inner Light and the Yoga of Inner Sound. This paper systematically recovers a third and previously neglected path: the Yoga of the Inner Body, which unfolds through refined interoceptive perception of subtle, endogenous somatic signs. This path progresses from discrete internal sensations (Level 1: Sensation) to coherent longitudinal currents (Level 2: Flow), and culminates in a unified, non-conceptual vibratory field permeating the body (Level 3: Field). Through phenomenological analysis, these experiences are clearly distinguished from medical pathology (such as essential tremor or autonomic arousal) and from mystical mythology (such as literalist interpretations of Kundalini). A neurobiological account is proposed using interoceptive processing within a Predictive Coding framework: the Yoga of the Inner Body arises when sustained meditative attention reduces top-down cognitive filtering, allowing the physiological ground state of the autonomic system to enter conscious perception. Cross-cultural convergence, reflected in terms such as Spanda (Kashmir Shaivism), Wajd (Sufism), and Zifa Gong (Taoism), validates this phenomenon as a universal human capacity. The systematization of this path establishes embodiment not as a cognitive burden, but as a direct epistemology of presence, leading to the emergence of a new field: somatic consciousness studies.