"The only thing that could spoil a day was people. People were always the limiters of happiness except for the very few that were as good as spring itself."
我一直是这个世界上的陌生人，一个访客，一个游客。
The only limit to our realization of tomorrow will be our doubts of today.
No man really knows about other human beings. The best he can do is to suppose that they are like himself.
Chemistry is not just about mixing things in a flask. It's about understanding the world at a molecular level.