Taking an irreversible step with serious consequences.
Einen unumkehrbaren Schritt mit schwerwiegenden Konsequenzen tun.
"By going public with the information, he was crossing the Rubicon."
"Indem er die Information öffentlich machte, tat er einen unumkehrbaren Schritt."
to get into an argument or fight
to continue believing in something or someone
to watch for something or someone carefully
to campaign for a political position
facing a decision or choice
to succeed at something easily