The secret to living a full life with no regrets and to staying young is to figure out what you believe in and fight for it. If you lose, don't give up. If you win, raise the bar, and then rare back and do something else. And remember that, with the accumulation of years, our responsibilities to the future grow greater, not less.

The earth is warming at an alarming rate, we are running out of fossil fuels, and it is long past time for us to take action to correct these problems.

Success is not the measure of a man but a triumph over those who choose to hold him back.

I issued a number of denials to people I thought needed to hear them

President Obama's approach embodies the values, the ideas and the direction America has to take to build the 21st-century version of the American Dream: a nation of shared opportunities, shared responsibilities, shared prosperity, a shared sense of community.

I made a big mistake. It is indefensible and I am sorry.

There's nothing wrong with making mistakes. Just don't respond with encores.