You have to believe in yourself, even when no one else does.

"The best way to learn mathematics is to do mathematics."

心理学的任务是绘制意识的结构图。

我发现自己一直会担忧明天，当明天变成今天时，我又开始担忧起明天来。

如果你是战士，别为你自己的自由而战，而要为你战友的自由而战。这样，战争对你俩来说，就会更加鼓舞人心。

The beauty of physics lies in its ability to explain the complexities of the universe with simple principles.