“在科学中，重要的不是获得新的事实，而是发现思考它们的新方法。”

History is that certainty produced at the point where the imperfections of memory meet the inadequacies of documentation.

如果不理解两者，就无法理解个人的生活或社会的历史。

The world must be set in order. The time has come when ethics must be dealt with by science, and never again by mere opinion.

"The best way to predict the future is to shape it."