The only limit to our realization of tomorrow will be our doubts of today.
译文:抬头望去,看不到那繁华的景象。所谓的繁华,不过是虚幻杂乱的,而世人却贪恋不已。
进步的概念必须建立在灾难的观念之上。
The behavior of the whole cannot be predicted from the behavior of its parts taken separately.