你的挣扎不能定义你，你如何克服它们才能定义你。

The individual has always had to struggle to keep from being overwhelmed by the tribe.

妈妈，你怎么那么爱笑？ / 因为妈妈生了你呀。

To understand behavior, we must look at its purpose in the context of survival and adaptation.

I know that the appearance of Los Angeles at four o 'clock in the morning every day.