Eusebeia
Eusebeia is a Greek word abundantly used in Greek philosophy as well as in Greek translations of texts of Indian religions and the Greek New Testament, meaning to perform the actions appropriate to the gods. The root seb- is connected to danger and flight, and thus the sense of reverence originally described fear of the gods.
Classical Greek usage
The word was used in Classical Greece where it meant behaving as tradition dictates in one's social relationships and towards the gods. One demonstrates eusebeia to the gods by performing the customary acts of respect. By extension one honors the gods by showing proper respect to elders, masters, rulers and everything under the protection of the gods.For Platonists, "eusebeia" meant "right conduct in regard to the gods". For the Stoics, "knowledge of how God should be worshiped". The Epicureans teach that a pious attitude towards a person of wisdom benefits the one who does the honoring.
In ancient Greek religion and myth the concept of eusebeia is anthropomorphized as the eu-daimon of piety, loyalty, duty and filial respect. According to one source, her husband is Nomos, and their daughter is Dike, goddess of justice and fair judgment. In other tellings, Dike is the daughter of the god Zeus and/or the goddess Themis. The Roman equivalent is Pietas. Her opposite was Dyssebeia, daimon of impiety.
The opposite of eusebeia is asebeia, which was considered a crime in Athens. The punishment could have been death or being exiled. Some philosophers, such as Anaxagoras, Protagoras and Socrates were accused and trialed by the Heliaia.