Twin aspects of the same deity (see Alexander the Great). Ormuzd-worship includes elements of fire, sun and light and a minimum of ritual: Ormuzd is described as a lord of law and light. Ahriman-worship includes elements of darkness, violence and violent sexuality with elaborate mystery rituals. (I do not believe the word “chaos” is ever explicitly used in connection with Ahriman). Ormuzd is portrayed as the primary/principal god behind all life- and light-giving gods worshipped under various names throughout the world, and Ahriman is portrayed as the primary/principal god behind all death- and darkness-bringing gods worshipped under various names world-wide. During the course of The Greater Conqueror, Simon temporarily becomes Ormuzd’s principal agent on Earth (during the period of time he is possessed of the spirit of the Eternal Champion—though that phrase is never used—he worships Ormuzd) not long after Alexander’s mind comes under the control of Ahriman.