The five platonic solids are geometric expressions of the third dimensional matrix of creation.

Each one is connected to an element.

From here we see the nestings and interconnections that they form.

The Ancient Secret of The Flower Of Life, Vol-1&2 by Drunvalo Melchizedek offer an understanding of how geometry works within the 3D creation matrix.

In my studies it was a necessary step in the evolutionary process of remembering how consciousness intersects via the elements. Each element then resonates within the wholistic construct.