Metatrons' Cubs has all 5 of the platonic solids within it:
The Flower of Life = 84
All the shapes can be derived from The Flower of Life, sacred geometry.
What all five shapes have in common, and what makes them sacred to sacred geometry, is as follows:
Their spiritual meaning is as follows:
Notice how 'Light' and 'Ether' come together.
Notice how Greece and Platonism come together as well.