For interests that are vital to the U.S. - that is, essential for our survival and wellbeing - the U.S. should be prepared to use military force - including unilaterally, if necessary.

When we succeeded in winning the Cold War, escaping a nuclear Armageddon that could have killed us all, the U.S. inevitably had a serious problem about an encore: what now for our place in the world?

There are two great tragedies in life: one is to fail to achieve one's grandest ambitions, and the other one is to succeed.

The best simpleminded test of expertise in a particular area is an ability to win money in a series of bets on future occurrences in that area.

And I hope that we can learn the lessons of the past in looking at the current challenge that China poses to a ruling America.

Terrorism is really the only existential threat to America as we know it - as a free country that plays a leading role in the world.

I think the election of Trump was an expression of what happens in ruling powers as they become alarmed.

Putin needs to understand and feel in his gut that if the Chechens get a nuclear bomb, they're going to Moscow first, they're not coming to New York.

Even when walking in the company of two other men, I am bound to be able to learn from them. The good points of the one I copy, the bad points of the other I correct in myself.

Forecasts may tell you a great deal about the forecaster

That is the way it is with a wound. The wound begins to close in on itself, to protect what is hurting so much. And once it is closed, you no longer see what is underneath, what started the pain.

The design should make the product speak to you.

The ground we stand on looks solid enough, but if something happens it can drop right out from under you.

Most of our social nature is like that of other primates - we're mostly out for ourselves.

Sweeping from butcher's stalls, dung, guts, and blood, Drown'd puppies, stinking sprats, all drench'd in mud, Dead cats, and turnip-tops, come tumbling down the flood.

Don't you think almost anything can be funny? Almost anything.

The future author is one who discovers that language, the exploration and manipulation of the resources of language, will serve him in winning through to his way.