自由民主的传播和世界经济的整合已经创造了一种情况，即大国不再愿意冒险相互开战。
The spread of liberal democracy and the integration of the world economy have created a situation in which the major powers are no longer willing to risk war with one another.
Every challenge in the quarry is an opportunity to innovate.
如果你做不到，那就去教别人。
我宁愿接受一个聪明人最尖锐的批评，也不愿接受大众无知的赞同。
最大的风险就是不冒任何风险。在一个快速变化的世界里，唯一注定失败的策略就是不冒险。