Bart: religion for the most part was not directly connected with ethics

But ethics were not part of religion, generally speaking. Instead, if there was a realm to speak about how we ought to live our lives, it was in the realm of philosophy, not religion. So good behavior was indeed important for people. But not as part of their religious practices.

Stephen: You do not qualify that for Ancient Judaism?

In that religion God does give 10 Commandments which has ethical commands.

Not only is there a need to qualify it for Ancient Judaism. Some qualification needs to be made for Ancient Roman Religion, at least during Augustus’ reign if not forward.

Ethics: moral principles that govern a person’s or group’s behavior.

Second, The Aeneid is about “Augustus as Aeneas” making choices in line with the gods of Rome to found Rome. So, I’d say Virgil would see a connection between religion and ethical obligation to act a certain way.

The Roman ideal of pietas (“piety, dutiful respect”), which can be loosely translated from the Latin as a selfless sense of duty toward one’s filial, religious, and societal obligations, was a crux of ancient Roman morality. Aeneas’s pietas extends beyond his devotion to his father;

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we also see several examples of his religious fervour. Aeneas is consistently subservient to the gods, even if it is contradictory to his own desires, as he responds to one such divine command, “I sail to Italy not of my own free will.”