This is my (Shaman) perception of a cube:
a) pic related
b) used in Light Language:
The cube is a six-sided Platonic solid. Each of its faces is a square. The cube can be the most restricting and limiting shape in Light Language. It reaches stability between the physical and spiritual planes. With the spiritual plane being the earth boundary and the physical plane being the upper boundary, a strong reality is created. The cube works as a building block that can keep all energy and attention focused on the center of the cube. It provides a solid and well-balanced perspective.
Know that the cubes can actually block out all other forms of energies. Anything that is put inside a cube does not get interrupted. The cube is therefore useful in concentration. By keeping all the energies contained in such a manner, the cube stabilizes and limits the use of outside energies. The use of the cube needs to be thought out precisely before being utilized. Only when there is a need to stay in a specific energy, or for an essence to be maintained, is the cube advisable. The containment and confinement abilities of the cube may be used with the integrity of the user.
Stabilizers. [Solidifies, establishes, immobilizes, unchangeableness]. Cubes block in energy. Anything inside a cube does not get interrupted. A cube contains and confines, limits and restricts. It can control emotions and energies. It keeps things in; it keeps things out. It can be negative or positive according to your intention. Anchors in the energy. Sequential activity leading to stable results. After a big healing, this shape solidifies the whole previous string of geometries used in the healing. You may want to put it in to keep the healing stable.