All the businesses from the beginning of history have struggled with product development (assuming there is a market, doing the market testing and so on). But now they start with customer development. Get the customer who says, "Yes. I want that. I need it. I wanna use it. I'll pay for it." And then you go back and work with your engineers. It is changing the world!

Never consider the possibility of failure; as long as you persist, you will be successful.

Demonstrate to your customer the difference between price and cost. The price is what it takes to purchase the item. The cost is the amount the customer eventually pays. They are not the same.

Working at something you don't care about is the very best way to waste your life.

Start with a picture of your goal as already achieved in the future, and work back to the present. Imagine the steps that you would have taken to get from where you are now to where you want to be.

The success you are enjoying today is the result of the price you have paid in the past.

Communication is a skill that you can learn. It's like riding a bicycle or typing. If you're willing to work at it, you can rapidly improve the quality of every part of your life.