The classical elements are a key feature of the Wiccan world-view. Every manifest force or form is seen to express one of the four archetypal elements — Earth, Air, Fire and Water — or several in combination. Some add a fifth or quintessential element called Spirit (also called aether or akasha). The five points of the frequently worn pentagram symbolize, among other things, the four elements with spirit presiding at the top. In the casting of a magic circle, the four cardinal elements are visualized as contributing their influence from the four cardinal directions.