在追求统一理论的过程中，我们必须拥抱未知，并愿意质疑我们最珍视的信念。

I like to be challenged. I like to do things that people say I can't do.

I cannot teach anybody anything。I can only make them think.

The more successful I become, the more I need a man who is not intimidated by me.

解析：用功在于为善之心真切。