Imagine someone who knows absolutely nothing about the anatomy or physiology of the human body: they might wonder how everything comes together to create a being who walks, breathes, eats, and expresses thoughts and feelings.
They would need to be shown that under the skin they see, there is flesh, organs, muscles, blood vessels, nerves, and so on that they cannot see and, finally, a skeleton to hold everything together.
Well, the same is true for the universe, but on a colossal scale.
The universe is a body, the body of God, and our physical body is created in its image. Just as our body has a framework, a skeleton, without which it would collapse, so too is the universe supported by a structure which holds everything in equilibrium, from the galaxies to the most infinitesimal particles of matter forming atoms.
It is this structure that makes life possible and it constitutes what initiatic philosophy calls the world of principles.