The new energy future is decentralised, entrepreneurial and needs people like you to say 'Give me a clean car, give me solar shingles to put on my roof - give me a clean future'

Effort, not ability, makes the biggest difference in achievement.

I believe that a worthwhile life is defined by a kind of spiritual journey and a sense of obligation.

You have to make a conscious decision to change for your own well-being, and that of your family and your country.

We need to help younger people recognize their own capacity to do good, and help them discover the rewards of generosity.

Most illegal immigrants are not by nature lawbreakers. Most are looking for the chance to live in dignity. Nevertheless we must continue to discourage illegal immigration for it undermines control of our borders...and even more punishes hard-working people who play by the rules and who wait for their turn to come to the United States. Therefore we must enforce our laws, but we will do so with justice and fairness.

When you get asked hundreds of questions, it's not possible to remember the answer to every one.