America must not ignore the threat gathering against us. Facing clear evidence of peril, we cannot wait for the final proof, the smoking gun that could come in the form of a mushroom cloud.

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.

Interconnection permeates the entire universe. We are all one.

The question is not if we will be extremists, but what kind of extremists we will be. The nation and the world are in dire need of creative extremists.

Worries flee before a spirit of gratitude.

You can either control yourself by simple two lines of bitter truth, OR by confusing yourself in long stories to comfort with a lie

When I'm onstage I feel changed.

Money is only unused power. The real purpose of wealth, after food, clothing and shelter, is philanthropy.

There is really no right and wrong. I recognize no right and wrong.

No one has mastery, Before he is at the end, Of his art and his life.

Happiness is life served up with a scoop of acceptance, a topping of tolerance and sprinkles of hope, although chocolate sprinkles also work.

Just because you can afford it doesn't mean you should buy it.