人生苦短，必须快乐。

如果你没有得到奇迹，那就成为一个奇迹。

我不喜欢被指挥，我喜欢自己做决定。

"When you are writing, you are trying to find out something which you don't know."

So given a Time Turner, I would tell my 21-year-old self that personal happiness lies in knowing that life is not a check-list of acquisition or achievement. Your qualifications, your CV, are not your life, though you will meet many people of my age and older who confuse the two. Life is difficult, and complicated, and beyond anyone’s total control, and the humility to know that will enable you to survive its vicissitudes.