The Fifth Element is about enlightenment.
A major piece of evidence is this line from the opening scene:
"This divine light they talk about...what is divine light?"
Given the presence of stones and 4 elements and a supposedly perfect being, it seems they were dancing around the notion from Hermetic Alchemy that the Philosopher's Stone is made from the four elements united in a state of natural and perfect balance.
Like Star Wars, The Matrix, Cinderella, The Greatest American Hero, Green Lantern, Guardians of the Galaxy, and other Hollywood productions, The Fifth Element is spiritual allegory that flies over the heads of most people.
As Evey Hammond's father is said to have said in V for Vendetta, "Artists use lies to tell the truth."
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