To write a good love letter， you ought to begin without knowing what you mean to say， and to finish without knowing what you have written.
要写一封好的情书，你应该在不知道要说什么的情况下开始写，然后在不知道自己写了什么的情况下结束。
自然法则不仅仅是被观察到的，而是观察者与被观察者之间相互作用的结果。
In science, we must be open to the possibility that our most cherished theories could be wrong.
"Sometimes, the hardest thing and the right thing are the same."