« Concetric skies in the Christian Middle-Ages », based on an article by Jean-Pierre Luminet (astrophysicist)
The Christian Middle-Ages believed in a finite world, with a centre : the Earth, and an edge.
But what happens if I stand at the edge, and I throw a stick outwards, beyond that edge ?
The world we live in holds things we can see, touch, feel or hear. These things are ephemeral: they don’t last forever.
Humans are born, they live, and they die.
Beyond the limits of this world lies a spiritual world, the divine world.
If I throw a stick at the edge of the world, it either falls back on the earth, or it transforms into an ethereal element, a stick spirit.
The finite world in which we live lies within another world, where things are eternal: they last forever.