Leadership and learning are indispensable to each other.

We are not afraid to entrust the American people with unpleasant facts, foreign ideas, alien philosophies, and competitive values. For a nation that is afraid to let its people judge the truth and falsehood in an open market is a nation that is afraid of its people.

I don't think the intelligence reports are all that hot. Some days I get more out of the New York Times.

For time and the world do not stand still. Change is the law of life. And those who look only to the past or the present are certain to miss the future.

Wars are, of course, as a rule to be avoided; but they are far better than certain kinds of peace.

Writer's block! It doesn't exist. You just long for ideas to go away so you have an idea of peace.

Russia isn't going to start a war. They can't afford it. I think Mr. Putin can be dealt with if we stop screaming at him. You can work with the guy. You just have to know who he is.

I used Evernote almost exclusively for researching 'The 4-Hour Body.' I was able to eliminate all of the perpetually open tabs and multiple bookmarking services. It's also all automatically backed up to Evernote, which gives me peace of mind.