If you give people tools, and they use their natural abilities and their curiosity, they will develop things in ways that will surprise you very much beyond what you might have expected.

Perhaps without that adversity I might not have been able to preserve later on when my financial burdens were redoubled. I learned then how to keep problems from crushing me. I refused to worry about more than one thing at a time, and I would not let useless fretting about a problem, no matter how important, keep me from sleeping.

It is well enough that people of the nation do not understand our banking and monetary system, for if they did, I believe there would be a revolution before tomorrow morning.

Barack and I were raised with so many of the same values, like you work hard for what you want in life. That your word is your bond, that you do what you say you're going to do. That you treat people with dignity and respect, even if you don't know them and even if you don't agree with them.

Learn to sell. In business you're always selling - to your prospects, investors and employees. To be the best salesperson put yourself in the shoes of the person to whom you're selling. Don't sell your product. Solve their problems.

When it's too easy to get money, then you get a lot of noise mixed in with the real innovation and entrepreneurship. Tough times bring out the best parts of Silicon Valley.