真相是一把刀，它两面都割。
The truth is a knife, and it cuts both ways.
Innovation is the only way to break through the bottleneck.
A thermonuclear war cannot be considered a continuation of politics by other means (according to the formula of Clausewitz). It would be a means of universal suicide.
译文：想要看清一个人，应当看看他交的是什么朋友。