The casing (box) of Pandora?[Meaning] parable of the fact that things happen that are not irreversible.
Greek mythology (original text) in the Pandora's box, the interpretation of Erupisu that contains the "disaster" and "Erupisu (hope and expectations, a sign)", the interpretation that one of interpretation and, Erupisu also evil that good stuff there is.
And the cross the Rubicon?
【meaning】
To be crossing the Rubicon river, even of making the critical decisions and actions there.
[Notes]
The Rubicon river, ancient Roman times, the river that forms the border between Gaul and Italy, on the inside than the Rubicon River has been that it is not supposed to enter and brought the army. We have been punished if violation as a traitor, Julius Caesar crossed the river by pulling in large army, and headed to Rome. Caesar shouting "Sai was cast", is based on the historical fact that the river crossing, ignoring the Senate decree. From this fact, the original resolution can not be going back, we can say that to cause serious decisions and actions.