...the fact [is] that our borders leak like a sieve: those things cannot be permitted to continue in good conscience.

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.

Government is not the problem, and government is not the solution. We - the American people - we are the solution.

In science, if the last 50 years were the age of physics, the next 50 years will be the age of biology.

If one candidate is appealing to your fears, and the other one's appealing to your hopes, you’d better vote for the person who wants you to think and hope!

I think that the responsibility that the Democrats had may rest more in resisting any efforts by Republicans in the Congress, or by me when I was President, to put some standards and tighten up a little on Fannie Mae and Freddie Mac.

The community of nations may see more and more of the very kind of threat Iraq poses now: a rogue state with weapons of mass destruction, ready to use them or provide them to terrorists. If we fail to respond today, Saddam and all those who would follow in his footsteps will be emboldened tomorrow.