The most dangerous risk of all is not taking one.
Liberty cannot be preserved without a general knowledge among the people.
Be yourself; everyone else is already taken.
数学家的工作永远不会真正完成;总有更多的东西需要探索。
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。