The die is cast

 

Whenever we say, "The die is cast," we attach finality and resolution to the job at hand; there is no turning back. Julius Caesar was a man of his word; he never took back anything he said. His soldiers knew this well.  

They may have experienced some apprehension about his plans before he took them across the Rubicon, but once they set foot on the opposite bank and made his historic utterance. "The dice have been thrown," they knew there would be no turning back.

To this day the import of Caesar's words is clear in our use of  "the die is cast" to attach finality to a situation.