年轻人不知道什么是谨慎，因此他们尝试不可能的事情——并且一代又一代地实现了它。

爱是不求回报的给予。

So that morning in 1962 I told myself: Let everyone else call your idea crazy . . . just keep going. Don’t stop. Don’t even think about stopping until you get there, and don’t give much thought to where “there” is. Whatever comes, just don’t stop.