To live is the rarest thing in the world. Most people exist, that is all.
活着是世界上最罕见的事，大多数人只是存在而已。
To forget is to betray; to remember is to resist.
The hardest challenges often lead to the greatest breakthroughs.
The security dilemma is a fundamental feature of international politics, as states' efforts to increase their own security often decrease the security of others.
The most dangerous phrase in technology is 'we've always done it this way'.
"Life is 10% what happens to you and 90% how you react to it."