Americans do not turn away from duties because they are hard.

Fool me once, shame on - shame on you. Fool me - you can't get fooled again.

Leadership to me means duty, honor, country. It means character, and it means listening from time to time.

Terrorist attacks can shake the foundations of our biggest buildings, but they cannot touch the foundation of America. These acts shatter steel, but they cannot dent the steel of American resolve.

Freedom itself was attacked this morning by a faceless coward, and freedom will be defended.

Our enemies are innovative and resourceful, and so are we. They never stop thinking about new ways to harm our country and our people, and neither do we.

Freedom is not our gift to the world it is God's gift to humanity.

To those of you who received honours, awards and distinctions, I say, well done. And to the C students, I say, you too can be president of the United States.

I do solemnly swear that I will faithfully execute the Office of President of the United States, and will to the best of my Ability, preserve, protect and defend the Constitution of the United States

A dictatorship would be a heck of a lot easier, there's no question about it.

I believe a marriage is between a man and a woman.

It's not my brain that's writing the book, it's these hands of mine.

I love the opportunity to shoot digital because you can shoot so many takes, it's really malleable, it's a ton of fun, and it is easy.

The crowd will follow a leader who marches twenty paces ahead of them, but if he is a thousand paces ahead of them, they will neither see nor follow him.

Success nullifies. You then have to do it again, preferably differently.

Listen to what people say about themselves; they will tell you everything you need to know.

This loss has left me truly heartbroken. Robin Williams was one of the brightest, most loving & wonderful people I've ever been blessed to know. I'll miss him more than I can ever express in words.

Every step I take is a blessing.

I don't choose between my house phone and my mobile. I don't choose between my laptop and my notebook. And I don't intend to choose between my e-reader and my bookshelf.

I often say that good crisis management is good decision-making under stress.

You won't change things unless you are prepared to fight, even if you don't win. But I do hate losing.