Transgression of any kind is always accompanied by a loss of self-esteem.

Your determination to become a more optimistic person in every part of your life will do more to ensure your success and happiness than any other single quality you can develop.

The more you do for others without expectation of return, the more you'll get back from the most unexpected sources.

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!

Always concentrate on the most valuable use of your time. This is what separates the winners from the losers. Self-esteem is the reputation you have with yourself.

Self-esteem is the reputation you have with yourself.

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