The human being needs sadness as much as he needs joy.
"Books are empathy machines. They allow us to step into someone else's shoes and see the world through their eyes."
在一个不断变化的世界中,唯一可持续的优势是比竞争对手学习得更快的能力。
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.