作家的职责是严谨、诚实地写作，永不妥协。
The writer's duty is to write with rigor, with honesty, and to never accept compromises.
The truth is rarely pure and never simple.
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.
The only limits that exist are the ones you place on yourself.