The above you referenced is not literal. Most every religion speaks of creation of the Universe being initiated by a word. This is true, base of creation is vibration. Sound is only one part of the spectrum of vibration as is heat, radiation, electromagnetic, light, microwave, and... at the far end from sound, thought. Even matter is just energy at a slow rate of vibration so it manifests into something tangible. Where the metaphor comes is, nothing including your own body are real. Scientists s