Our bodies are vibrating, even every and each of our organs is vibrating in different frequencies. Vibrations are the expression of energy.
If you go by the Christian books, look at the Gospel of John. "At the beginning there was Word." What is word if not speech? What is speech if not sound aka energy?
The Christians aren't the only ones who wrote about this, many secret cults in the past spoke how the Word, Mind, Intellect was the first principal of all Creation.
Everything is created from energy, energy produces vibrations and vibrations produce sound.
But sound is a form of energy and as such it produces vibrations which creates energy.
As above so below
