This is not truly necessary, as Zeus, by His very nature, sustains the Cosmos and ensures its continued order. The following article may provide further insight into this understanding.
Just as we are inhabited by a soul, so also the cosmos has a soul sustaining it, called Zeus. It is called this primarily because it is both ever-living (zōsa) and also the cause of life (zin) in all living things (zōsi). Therefore, Zeus is said to be the ruler of everything, just as in ourselves our soul and nature are said to govern. We call him Dia (Zeus in the accusative case) because all things come about and are preserved through (dia) him. Among some, he is also called Dios, and perhaps the genitive form is Deos, somewhat related to this. He is said to reside in heaven, which is where the most dominant part of the cosmic soul is, for our souls are also fire.
Ὦ Ἑρμῆ Τρισμέγιστε, Μέγιστε Μέγιστε Μέγιστε

