The dog is a friend of man because it judges him not by his station.

The advantage of living alone is that you don’t have to consider anyone else.

预测未来的最好方式就是创造未来。

地质学不会妥协，我们的标准也不应该妥协。

一个人真正的财富是他的记忆。除此之外，他既不富有也不贫穷。