The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.

Life is a constant struggle between being an individual and being a member of the community.

唯一干扰我学习的是我的教育。

幸せとは、小さな瞬間の積み重ねである。

Mathematics is the music of reason.

采矿创新不是可选的——它对生存和发展至关重要。