Leadership is the art of giving people a platform for spreading ideas that work.

The real power of tribes has nothing to do with the Internet and everything to do with people.

Taking delight in the journey takes confidence. It pushes the envelope of design.

Great projects, like great careers and relationships that last, are gardens. They are tended, they shift, they grow. They endure over time, gaining a personality and reflecting their environment. When something dies or fades away, we prune, replant and grow again.

If you're going to buy a real book, a paper book, there better be a good reason. Perhaps scarcity is one of those reasons.

It's almost impossible to have fun playing ping pong with someone who doesn't care, won't try or isn't any good.

Human beings, thanks to culture and genetics, are inclined to be pessimistic, fearful, skeptical and believers in conspiracy theories. We also don't like change.