Hellenic polytheists worship the ancient Greek Gods—the Olympians, nature divinities, underworld deities—and heroes. Ancestors are honoured, both physical and spiritual. It is primarily a devotional or votive religion, based on the exchange of gifts (offerings) for the gods' blessings. Hellenismos has an ethical system based on the principles of reciprocity, hospitality, and moderation.
Hellenismos isn't a book-based religion; there is no single text believed by worshippers to be the word of the Gods. Instead, theological beliefs and practices are based on multiple sources:
- (1) Works of Homer, Hesiod, and others.
- (2) Individual experience and inspiration.
- (3) Scholarly research.
There is no central organisation or hierarchal clergy, worshippers act in a personal manner by personally dedicating themselves to a favorite God, or a number of Gods, reflecting their personal spirituality.