It's All Light presents a unified theory in the complete sense in that it reconciles not only the contradictory theories in physics but also reconciles science with spirituality. It includes a consistent explanation of, for example, the opposing theories of quantum mechanics and relativity, the unification of the four major forces in physics, the wave-particle duality of light, perpetual motion, the double-slit experiment, dark mater, creation and growth of form, and includes what can be termed 'spiritual' experiences, for example, healing, telepathy, clairvoyance, near-death experiences, remote viewing and the experience of love. The ancient Greek concept of 'physis' described a fundamental, universal energy which is pointed to today by quantum physics. The mathematical Phi, from physis, is a universal constant and is a never-ending number; suggestive of infinity or omnipresence. The Morphic resonance of light is the physis, seen or unseen, dependent on speed, taking form due to sound. Sound being slow light, so, It's All Light ... resonating. Coherent lightwaves are created by Love and compassion. The physics and evidence for this are provided as well as practical ways towards achieving Enlightenment or Oneness, drawing on references from modern science as well as ancient spiritual and religious texts. Coherence of waves creates accumulation of information and on a universal scale this would be omniscience/omnipresence A convincing argument that Love is the fundamental, universal energy.