The Cold War is over but Cold War thinking survives.

But scientists on both sides of the iron curtain played a very significant role in maintaining the momentum of the nuclear arms race throughout the four decades of the Cold War.

The present basic philosophy is nuclear deterrence.

I did not imagine that the second half of my life would be spent on efforts to avert a mortal danger to humanity created by science.

But the nuclear powers still cling tenaciously to their weapons.

The cold war is over, but cold war thinking survives.

I saw science as being in harmony with humanity.

I appeal to my fellow scientists to remember their responsibility to humanity.

My third appeal is to my fellow citizens in all countries: Help us to establish lasting peace in the world.

Indeed, the very first resolution of the General Assembly of the United Nations - adopted unanimously - called for the elimination of nuclear weapons.

This is the reality of nuclear weapons: they may trigger a world war; a war which, unlike previous ones, destroys all of civilization.

Integrity is a virtue which defines the depth of life.

He might never hear of them again in his life. Or there again, he might. That was the joy of travelling. Anything could happen

All suffering is the consequence of a constant quest.

That's the best way to feed the human mind. That's how Bob Marley did it. He never put it in your face. After you got the groove, you were just singing the hooks, because you thought it was cool.

Tragedy is one of the larger prices we pay for being alive. No one ever sidesteps tragedy. It is always there, shadowing us.

We can continue to make significant strides in the scientific community by exploring new stem cell research methods that do not include destroying human embryos.

Underdevelopment is a lack of maintenance.

All my kids love superheroes, but my middle daughter in particular is obsessed with Wonder Woman and Batgirl.

Growth isn't free it always has a cost.