A city is not a collection of machines but a container of life.

I love people who make me laugh. I honestly think it's the thing I like most, to laugh. It cures a multitude of ills. It's probably the most important thing in a person.

The peculiar evil of silencing the expression of an opinion is that it is robbing the human race； posterity as well as the existing generation； those who dissent from the opinion， still more than those who hold it.

跨越国界和学科的合作是解决世界上最紧迫的健康挑战的关键。