text: what is the purpose of a witches cauldron?   the purpose of the cauldron is to be a vessel for water, one of the stronger elements. it is necessary to contain the elemental form ( along with the various liquids it is a part of ) of water, in order to use the power of that element to invoke the spirits that are associated with it or offer thanks to the goddess, who created and replenishes all the elements. the cauldron is also a symbol of the goddess, as she is the vessel through which life is perpetuated again and again through the endless cycle.