The obsession with running is really an obsession with the potential for more and more life.

Happiness in this world, when it comes, comes incidentally. Make it the objet of pursuit, and it leads us a wild-goose chase, and is never attained. Follow some other object, and very possibly we may find that we have cought happiness without dreaming of it.

The truth is that we are all alone in the world.

数学不是沿着一条清理得很好的高速公路小心行进，而是进入一个陌生的荒野的旅程，探险者常常会迷路。

The best stories don’t talk down to children—they invite them in.

我认为生活中任何事的目标都是快乐。