The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

The only thing that scares me more than space aliens is the idea that there aren't any space aliens. We can't be the best that creation has to offer. I pray we're not all there is. If so, we're in big trouble.

A strong business is built on strong values.

无论你打算做什么，现在就做。条件总是不可能的。

For every dollar you spend purchasing something substantial， expect to pay a dollar in repairs， maintenance， or disposal by the end of its life.