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.

建筑的强度不仅在于其材料，还在于使用它的人的精神。

In despair, we can find true hope.

The poor have no choice but to be honest. The rich can afford to be dishonest.

The only limit to our realization of tomorrow is our doubts of today.