Perhaps unhappiness can stem from having only one perspective to play with.

旅行就是发现每个人对其他国家的看法都是错误的。

我相信努力、纪律和尊重。

The quality of an organization's vision determines the quality of its future.

译文：希望人们互相赞美，而不是彼此伤害。

形容世事变化无常，难以预测。

A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die, and a new generation grows up that is familiar with it.

The destiny of world civilization depends upon providing a decent standard of living for all mankind.