Virtus, often associated with the concept of pietas, refers to moral excellence, courage, and the fulfillment of one's duty to family, country, and gods in Roman culture. This idea is central to the characters in Vergil's Aeneid, as it encapsulates the heroic qualities expected of leaders and warriors in the narrative. Virtus serves as a guiding principle for Aeneas, illustrating his commitment to destiny and his responsibilities to both his people and the divine.