Darkness cannot drive out darkness； only light can do that.Hate cannot drive out hate； only love can do that.

我不是一个认为一切都有原因的人，但我确实相信，如果你努力工作并忠于自己，好事就会发生。

The obligation of subjects to the sovereign is understood to last as long, and no longer, than the power lasteth by which he is able to protect them.

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.

保持谦逊，保持渴望。

"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

世界的历史是各民族交融的历史。