The superpowers often behave like two heavily armed blind men feeling their way around a room, each believing himself in mortal peril from the other whom he assumes to have perfect vision.

超级大国的表现常常像两个全副武装的盲人，同处一室，到处摸索，都认为对方目光如炬，因而使自己受到致命的威胁。

youdao

While being in no physical danger at all, you feel as if you are in mortal peril.

CNN: How can I control my panic attacks?

He had imagined himself as a boy winning the World Series, throwing the perfect pass, saving his favorite teachers from mortal peril.

FORBES: The Social Animal by David Brooks: A Scornful Review

Mr Cameron and Mr Obama, outside the eurozone but in mortal peril if it spirals deeper in crisis, are demanding urgent, dramatic and speedy action.

BBC: Grumpy, lukewarm support for eurozone Greece