The true power of mathematics lies in its ability to simplify the complex, making the incomprehensible understandable.
People demand freedom of speech as a compensation for the freedom of thought which they seldom use.
发展需要消除不自由的主要根源:贫困和暴政,经济机会的匮乏以及系统的社会剥夺,公共设施的忽视以及压制性国家的过度活跃或不宽容。