历史的终结将是一个非常悲伤的时刻。为了纯粹抽象的目标而愿意冒生命危险的斗争，全球意识形态斗争所唤起的勇气、想象力、理想主义，将被经济计算、无休止的技术问题解决、环境问题和对复杂消费需求的满足所取代。
The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.
Mental activity is the organism's dialogue with its environment.
质量从来不是偶然的；它始终是智慧努力的结果。
The way we see things is affected by what we know or what we believe.
千丈长堤，可能因为蝼蚁的洞穴而溃决；百尺高楼，可能因为烟囱的缝隙冒烟而焚毁。