Climate change constitutes a serious threat to global security.

Cathleen Falsani: What is sin? Barack Obama: Being out of alignment with my values.

If you've got a business - you didn't build that.

I wouldn't be the man I am today without the woman who agreed to marry me 20 years ago

Of all the rocks upon which we build our lives, we are reminded today that family is the most important.

I'm a warrior for the middle class.

As we look forward to the New Year, let's resolve to recommit ourselves to the values we share.

For the sake of our children and our future, we must do more to combat climate change.

Over the last 15 months, we've traveled to every corner of the United States. I've now been in 57 states? I think one left to go.

We run everything to ground. If you see something, say something. Report your concerns to law enforcement. They will be looked at, they will be reviewed.

You can't always come up with the optimal solution, but you can usually come up with a better solution.

The arc of the moral universe may bend towards justice, but it doesn't bend on its own.

Every country has violent, hateful, or mentally unstable people. What's different is not every country is awash with easily accessible guns.

The opportunity will not remain open indefinitely.

I’m convinced that a world in which girls are educated is a safer, more stable, more prosperous place.

Any time bombs are used to target civilians it is an act of terror.

On every continent, there are girls who will go on to change the world in ways we can only imagine, if only we allow them the freedom to dream.

My administration doesn’t have any secrets, and from now on, neither will you.

It's important to make sure that governments have some checks on what they do, that people can oversee what's being done so the government doesn't abuse it.