要理解心理学，就要在自然环境中观察行为。

The study of truth requires a considerable effort - which is why few are willing to undertake it out of love of knowledge - despite the fact that God has implanted a natural appetite for such knowledge in the minds of men.

我比自己想象的要坚强。

I think it is in the nature of poetry to be always hinting at something beyond what is actually said.

坚毅是对长期目标的激情和坚持。