Hecate has been referred to as the soul.
Hecate/Hekate altars are often depicted on Instagram and other social media outlets showing a prominent Hecate/Hekate figure and various items symbolizing/representing that which has returned to the soul.
On the Moon Card done by Ghoulish Garb and Michael Ford in another world, Hecate/Hekate is depicted. The Moon (often shown as part of the moon card) is the most mutable energy there is - that means it can be applied to anything to build that. For example, I may be using Moon energy to build this website...
Anyway, in the Moon card anything shown on there besides the moon and perhaps a body of water ('liquidized' energy, not solidified) is what has been built - the collective items for the whole deck.
When the Moon is void nothing can manifest. Nothing can be manifested.
Develop that negative energy, girl!