When Hellenistic kings founded cities, they also built temples for the old Olympian gods. In this way they spread Greek religious beliefs throughout the Hellenistic world. Greeks and non-Greeks in the Hellenistic world also honored and worshipped deities that had not been important in the Hellenic period or that were a blend of imported Greek and indigenous gods and goddesses. Tyche (TIGH-kee), for example, was a new deity, the goddess and personification of luck, fate, chance, and fortune.

Increasingly, many people were attracted to mystery religions, which in the Hellenic period had been linked to specific gods in particular places, so that people who wished to become members had to travel. But new mystery religions, like Hellenistic culture in general, were not tied to a particular place; instead they were spread throughout the Hellenistic world, and temples of the new deities sprang up wherever Greeks lived.

Mystery religions incorporated aspects of both Greek and non-Greek religions and claimed to save their adherents from the worst that fate could do. Most taught that by the rites of initiation, in which the secrets of the religion were shared, devotees became united with a deity who had also died and risen from the dead. The sacrifice of the god and his victory over death saved the devotee from eternal death. Similarly, mystery religions demanded a period of preparation in which the converts strove to become pure and holy, that is, to live by the religion’s precepts. Once aspirants had prepared themselves, they went through the initiation, usually a ritual of great emotional intensity symbolizing the entry into a new life.

Among the mystery religions the Egyptian cult of Isis took the Hellenistic world by storm. In Egyptian mythology Isis brought her husband, Osiris, back to life (see “The Nile and the God-King” in Chapter 2), and during the Hellenistic era this power came to be understood by her followers as extending to them as well. She promised to save any mortal who came to her, and her priests asserted that she had bestowed on humanity the gift of civilization and founded law and literature. Isis was understood to be a devoted mother as well as a devoted wife, and she became the goddess of marriage, conception, and childbirth. She became the most important goddess of the Hellenistic world.