The universe is a vast and mysterious place, and we are only beginning to understand its complexities.

历史不会重复，但它会以不同的形式重现。

I have made a ceaseless effort not to ridicule， not to bewail， not to scorn human actions， but to understand them.

解释：国家大而政绩小，国家的影响就跟它的政绩一样；国家小而政绩大，国家的地位也大。

"Every book is a journey, and every journey changes you."

心理学唯一有效的数据是可观察的行为。

过去并非死寂之地，穿越它绝非徒劳之举。