Greek Myth Pointing to Christian Truth?

I was reading "Elektra", by Euripides. The background is that upon returning home from the Trojan war,  Agamemnon, leader of the Greek forces,  was killed by his wife,  Clytemnestra, and her lover, Aigisthos. To protect her from Aigisthos, Elektra is married off to a poor, but very good and virtuous peasant.

It is Elektra's unnamed husband who begins the play,  giving the audience an introduction to the situation.  At one point he reveals that she's still a virgin,  "for how could I touch the daughter of such a great king?"

Modern man, idolizing sex, cannot conceive of Mary's perpetual virginity,  because, well, sex.

But,  to the ancient Greek,  whose views on sex were,  from our perspective,  quite libertine, could understand it.

Even in mythology, God laid the groundwork for the full revelation of Truth.