Abilities wither under criticism, they blossom under encouragement.

There is only one valid definition of a business purpose: to create a customer.

You hope for the best, but you've got to prepare for the worst.

The question I ask myself like almost every day is, 'Am I doing the most important thing I could be doing?' Unless I feel like I'm working on the most important problem that I can help with, then I'm not going to feel good about how I'm spending my time.

The only thing we know about the future is that it is going to be different.

That kind of divine discontent comes from observing customers and noticing that things can always be better.