发现的旅程充满了不确定性，但正是这些不确定性使科学如此令人兴奋。

The past is a foreign country; they do things differently there.

The press is the best instrument for enlightening the mind of man, and improving him as a rational, moral and social being.

世界充满了来来往往的迹象和奇迹，如果你幸运的话，你可能会抓住其中一个的尾巴。

理论的最高形式是能够将复杂的事物简化为简单而清晰的原理。