The beauty of mathematics is that it is both an art and a science.
Every ton of paper we recycle saves 17 trees. That's not just business, that's legacy.
The only thing that separates us from the animals is our ability to accessorize.
没有伟大的意志力就没有伟大的才能。
Earth provides enough to satisfy every man's needs, but not every man's greed.
Every woman deserves to be treated with respect and dignity.