I noticed one search phrase used to find my blog was
“what is Hellenismos rede?” referring to the Wiccan Rede, “An harm it none, do what thou wilt”. (There’s also lots of debate among Wiccans and Witches about how that should be interpreted, whether it should be emphasized as a form of ethics, yada yada other Not My Religion, Not My Problem Issues. Just an FYI though, in case you go onto a forum thinking the Rede and/or the Law of Three are universally agreed upon things even among Wiccans let along greater Pagan-dom.
Anyhow, Hellenic religion & philosophy historically existed in many diverse forms, and does in its revival as well. There is no one source of ethics- the Delphic Maxims, a group of sayings traditionally attributed to the Oracle of Delphi which exist in various numbers, translations and interpretations are commonly cited as a source of ethics. The two most famous are “Nothing in Excess” (or moderation in all things) and “Know Thyself”. Be careful, as there a lot of watered down pop culture and New Age-ified forms of these. Your best bet is to be aware of different ethical philosophies and virtues that existed at various times in ancient Greece and the Hellenistic (Greek-speaking/influenced) world- what was considered more “mainstream” in a particular context, and what was more radical? Then how is this relevant in a modern context? Look at opinions held by different Hellenic polytheists, but think for yourself, and consider their different influences, focus on particular cultus, philosophies, time periods, city-states etc.
Of Thespiae- Maxims of Delphi– Ruadhan J. McElroy is focuses on the Boetian region, is a devotee of Eros, and a Hedonist (a Greek philosophy not in the modern sense of the word)