这个世界是最好的可能世界。
每个物种都有其独特的价值和生存意义。
What's terrible is to pretend that second-rate is first-rate. To pretend that you don't need love when you do; or you like your work when you know quite well you're capable of better.
The most profound theories often arise from the simplest observations.
量子力学中的纠缠概念不仅仅是一个理论上的奇观；它对我们理解信息和因果关系有着深远的影响。
历史学家是向后看的先知。