When it comes to telephone calls, nobody is listening to your telephone calls. That's not what this program is about. ... What the intelligence community is doing is looking at phone numbers, and durations of calls; they are not looking at people's names and they're not looking at content. ... If the intelligence committee actually wants to listen to a phone call they have to go back to a federal judge, just like they would in a criminal investigation.

There is a reason why George Washington is always one of the top three presidents, and it's not because of his prowess as a military leader; it's not because of the incredible innovations in policy that he introduced. It's because he knew when it was time to go.

Every three weeks, we bring online as much solar power as we did in all of 2008.

Each path to knowledge involves different rules and these rules are not interchangeable.

If you were successful, somebody along the line gave you some help... Somebody helped to create this unbelievable American system that we have that allowed you to thrive. Somebody invested in roads and bridges. If you’ve got a business - you didn’t build that. Somebody else made that happen.

Part of what makes me most optimistic is if you look at the attitudes of young people. Across the board, young people are much more comfortable with respecting differences. They are much more comfortable with diversity.

Some of the same politicians and pundits that are so quick to reject the possibility of a diplomatic solution to Iran's nuclear program are the same folks who were so quick to go to war in Iraq and said it would take a few months.