Fire worship is an ancient religious practice based on the idea that fire is sacred. Since early times, people have worshiped fire because it destroys, purifies, and gives heat and light. Some equate a god or spirit with fire. The Parsis of India and other followers of a religion called Zoroastrianism use fire as a divine symbol. The ancient Greeks and Romans considered fire one of the major elements that made up the world. Today, people build bonfires for various occasions. This practice probably developed from the tradition of fire worship. See also Vesta.