The most significant threat to liberal democracy today is not from the outside, but from within.
今天对自由民主最严重的威胁不是来自外部,而是来自内部。
Mathematics is the art of giving the same name to different things.
Ideas are like fish. If you want to catch little fish, you can stay in the shallow water. But if you want to catch the big fish, you've got to go deeper.
One never reaches home, but wherever friendly paths intersect the whole world looks like home for a time.