心理过程因其目的而存在。

自由的秘诀是勇气。

如果你可以直接从植物中制造肉类，为什么还需要动物呢？

你不可能不了解历史。

No matter how good you get, you can always get better, and that's the exciting part.

Men and women differ in their reproductive strategies because they have faced different adaptive problems throughout evolutionary history.

理论必须是美丽的。