天地和宇宙虽然广阔，但在更大的尺度上也不过是一小部分。

小说是可能的艺术，而可能总是比现实更可怕。

我们不是从祖先那里继承了地球，而是从子孙那里借来的。

I earnestly wish to point out in what true dignity and human happiness consists.

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.

Love is not a profession, it's a condition.