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.
密码学是将信息转换成一种形式，使任何没有解锁密钥的人都无法理解的艺术。
音乐是心与心之间的桥梁。
每一次失败都是通往成功的垫脚石；拥抱它并成长。
最成功的社会是那些能够在强大国家的需求与个人自由的需求之间取得平衡的社会。
我想那会是一场灾难。外星生命很可能遥遥领先于我们。在我们所处的星球上，先进种族遭遇较为原始人类的历史是不幸的，虽然他们属于同一物种。我觉得我们应当保持低调。
领导者的速度决定了团队的速度。