Perhaps one of the most pervasive moral concepts in ancient Greek literature is that all human actions are bound by a predetermined fate. The moral lesson is that what people do, either to themselves or to others, is set in stone well before their birth. While more contemporary philosophers and theorists argue that this conception suggests a lack of moral culpability (meaning people can’t be held responsible for their actions if they can’t control them), ancient Greeks believed that just as people’s actions were predetermined, so too was their moral worth. Perhaps the best example of this is Sophocles’ play "Oedipus Rex."
Though they didn’t use the term “karma,” ancient Greek’s certainly believed that the actions of a person would be revisited upon that person, whether good or bad. That is, if a person mistreated somebody, he would be mistreated at some point in his life. Similarly, if a person was kind or helpful to somebody, she would be the beneficiary of some future kindness or help. One of the best examples of this is Aeschylus’ play "The Oresteia."
Excessive pride or hubris is an individual's belief that he is somehow unique and more powerful than some overarching, life-governing principle, typically fate. All the moral lessons concerning hubris are essentially cautionary. Odysseus from Homer’s epic poem "The Odyssey" is a prime example of a character suffering from hubris, as he believes he is not subject to the rules that govern other people.
Similar to the principle of karma, ancient Greek’s desire to honor their gods stemmed from the belief that if they did honor a god, the god would reward them, but if they did not honor a god, bad things would happen to them. The story of Baucis and Philemon caring for a disguised Zeus and Hermes, who in return rewarded Baucis and Philemon and killed all their neighbors, is a good example. Individual examples also exist in "Oedipus Rex," "The Oresteia" and in "The Odyssey."