When we give what we can, and give it with joy, we don't just renew the American tradition of giving, we also renew ourselves.

I know that the precise magnitude and patterns of climate change cannot be fully predicted. But global warming clearly is a growing, long-term threat with profound consequences. And make no mistake about it, it will take decades to reverse.

When you're a former president, you have much less power, but you have a lifetime of experience and contacts and if you've got the energy, you can bring influence to bear on a small but still fairly substantial number of things where you can concentrate on it because you don't have to change the subject when you wake up in the morning and there's something else in the newspaper.

Posterity is the world to come; the world for whom we hold our ideals, from whom we have borrowed our planet, and to whom we bear sacred responsibility. We must do what America does best: offer more opportunity to all and demand responsibility from all.

First, I worry about climate change. It's the only thing that I believe has the power to fundamentally end the march of civilization as we know it, and make a lot of the other efforts that we're making irrelevant and impossible.

When we got organized as a country and we wrote a fairly radical Constitution with a radical Bill of Rights, giving a radical amount of individual freedom to Americans, it was assumed that the Americans who had that freedom would use it responsibly.

From Bill Clinton speech- People are more impressed by the power of our example rather than the example of our power.