质量是免费的。它不是礼物，但它是免费的。花钱的是那些不质量的东西——所有那些没有第一次就把工作做好的行为。

Success is a series of small wins.

I have always believed that technology should do the hard work – discovery, organization, communication – so users can do what makes them happiest: living and loving, not messing with annoying computers! That means making our products work together seamlessly.

数学的美妙之处在于它常常引导我们发现关于物理世界的真理，而这些真理是我们无法通过其他方式发现的。

You have to believe in yourself, even when no one else does.