The universal truth is beyond question-the only people who excel are those who have decided to do so.

The way you make something happen is to do something that a fool could screw up.

It's more important that you be passionate about what you do all day than it is to be passionate about the product that is being sold.

What tribes are, is a very simple concept that goes back 50 million years. It's about leading and connecting people and ideas. And it's something that people have wanted forever.

Don't waste time looking for a better pencil: learn to write better.

Finding new ways, more clever ways to interrupt people doesn't work.

Sooner or later, many idealists transform themselves into disheartened realists who mistakenly believe that giving up is the same thing as being realistic.