文明毀滅於自殺,而不是他殺。
Civilizations die from suicide, not by murder.
文明是一種運動,而不是一種狀態,是航程,而不是港灣。
Civilization is a movement, not a condition; it is a voyage, not a harbor.
我相信,文明的誕生與發展,來自於自身成功地應對不斷的挑戰。如果她被挑戰所征服,則敗落,分崩為碎片。
Civilizations, I believe, come to birth and proceed to grow by successfully responding to successive challenges. They break down and go to pieces if and when a challenge confronts them that they fail to meet.
在迄今歷史上出現的二十二個文明中的十九個,在它們達到相當於美國今天的道德水準時都毀滅掉了。
Of the twenty-two civilizations that have appeared in history, nineteen of them collapsed when they reached the moral state the United States is in now.