My favorite things in life don't cost any money. It's really clear that the most precious resource we all have is time.

The human voice is the most beautiful instrument of all, but it is the most difficult to play.

我相信艺术是一种教育形式。

The chief beauty about time is that you cannot waste it in advance. The next year, the next day, the next hour are lying ready for you, as perfect, as unspoiled, as if you had never wasted or misapplied a single moment in all your life. You can turn over a new leaf every hour if you choose.

物理定律是普适的，在像银河系中心这样的极端环境中测试它们是至关重要的。