The Pentagram was considered by the ancient Greeks and medieval astrologers to have supernatural properties and to be a protective symbol. Often in the past people would mark their doors with pentagrams to ward off evil witchcraft and spirits. In good magic today it is often used as a symbol to support transmission and communication with the spirit world. Its five points are often seen to represent the four classic elements of earth, water, air and fire joining with the fifth element of spirit to create life.