It is not scientifically possible to accurately predict the outcome of an action. To suggest otherwise runs contrary to historical experience and the nature of war.

Sometimes I write stuff that strangely predicts what’s going to happen in my life.

Among physicists, I’m respected I hope.

Not only do I not know what’s going on, I wouldn’t know what to do about it if I did.

The action we take and the decisions we make in this decade will have consequences far into this century. If America shows weakness and uncertainty, the world will drift toward tragedy. That will not happen on my watch.

If you only do things where you know the answer in advance, your company goes away.

Those who have knowledge, don’t predict. Those who predict, don’t have knowledge.

Science is not only a disciple of reason but, also, one of romance and passion.

I’ve always been interested in science – one of my favourite books is James Watson’s ‚Molecular Biology of the Gene.‘

In order to arrive at knowledge of the motions of birds in the air, it is first necessary to acquire knowledge of the winds, which we will prove by the motions of water in itself, and this knowledge will be a step enabling us to arrive at the knowledge of beings that fly between the air and the wind.

When I began in 1960, individuality wasn’t an accepted thing to look for; it was about species-specific behaviour. But animal behaviour is not hard science. There’s room for intuition.

You never know with these things when you’re trying something new what can happen. This is all experimental.

We should not teach children the sciences; but give them a taste for them.

Modern science says: ‚The sun is the past, the earth is the present, the moon is the future.‘ From an incandescent mass we have originated, and into a frozen mass we shall turn. Merciless is the law of nature, and rapidly and irresistibly we are drawn to our doom.

As scientists, we step on the shoulders of science, building on the work that has come before us – aiming to inspire a new generation of young scientists to continue once we are gone.

I hate cameras. They are so much more sure than I am about everything.

Electricity is really just organized lightning.

Our need for certainty in an endeavor as uncertain as raising children makes explicit ‚how-to-parent‘ strategies both seductive and dangerous.

The woman that deliberates is lost.

Fortune brings in some boats that are not steered.

Some people feel affronted when something they thought to be true doesn’t happen. If that’s the case, then your sense of risk is much higher, and that leads to risk aversion. You need to be able to be comfortable in uncertainty.

Poets say science takes away from the beauty of the stars – mere globs of gas atoms. I, too, can see the stars on a desert night, and feel them. But do I see less or more?

Science can lift people out of poverty and cure disease. That, in turn, will reduce civil unrest.

Why should I be studying for a future that soon may not exist?

Certain though I am – and ever more certain – that I must press on in life as though Christ awaited me at the term of the universe, at the same time I feel no special assurance of the existence of Christ. Believing is not seeing. As much as anyone, I imagine, I walk in the shadows of faith.

Change is always tough. Even for those who see themselves as agents of change, the process of starting a new thing can cause times of disorientation, uncertainty and insecurity.

One can never know for sure what a deserted area looks like.

Waking up every day and loving someone who may or may not love us back, whose safety we can’t ensure, who may stay in our lives or may leave without a moment’s notice, who may be loyal to the day they die or betray us tomorrow – that’s vulnerability.

I used to think information was destroyed in black hole. This was my biggest blunder, or at least my biggest blunder in science.

Electrical science has disclosed to us the more intimate relation existing between widely different forces and phenomena and has thus led us to a more complete comprehension of Nature and its many manifestations to our senses.

It’s so hard to know what to do when one wishes earnestly to do right.

And yet it moves.

Physics is really figuring out how to discover new things that are counterintuitive, like quantum mechanics. It’s really counterintuitive.

To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.

To be absolutely certain about something, one must know everything or nothing about it.

Do not keep saying to yourself, if you can possibly avoid it, ‚But how can it be like that?‘ because you will get ‚down the drain,‘ into a blind alley from which nobody has yet escaped. Nobody knows how it can be like that.

The capacity of the female mind for studies of the highest order cannot be doubted, having been sufficiently illustrated by its works of genius, of erudition, and of science.

I don’t think you ever really know what all you’re doing, so you have to act on faith.

There is nothing which can better deserve your patronage, than the promotion of science and literature. Knowledge is in every country the surest basis of public happiness.

I’m a spokesman for myself. It just so happens that there’s a bunch of people that are concerned with what I have to say. I find that frightening at times because I’m just as confused as most people. I don’t have the answers for anything.

Science must have originated in the feeling that something was wrong.

America is not nearly done. We’re only in the beginning. Who knows who we will be? Who knows… what color we will be? It is all something that, maybe, our descendants – if they survive that long – will see.

We will explore the mysteries of science and harness the power of technology and innovation. We will realise the opportunities of the digital world. Our youth will learn more from – and with – each other.

The most obvious characteristic of science is its application: the fact that, as a consequence of science, one has a power to do things. And the effect this power has had need hardly be mentioned. The whole industrial revolution would almost have been impossible without the development of science.

The most savage controversies are about matters as to which there is no good evidence either way.

Science is increasingly answering questions that used to be the province of religion.

I always avoid prophesying beforehand, because it is a much better policy to prophesy after the event has already taken place.

They say the universe is expanding. That should help with the traffic.

I’m not a fortune-teller.

Doubt is not a pleasant condition, but certainty is absurd.

There is nothing that living things do that cannot be understood from the point of view that they are made of atoms acting according to the laws of physics.

My first popular book, ‚A Brief History of Time,‘ aroused a great deal of interest, but many found it difficult to understand.

This world, after all our science and sciences, is still a miracle wonderful, inscrutable, magical and more, to whosoever will think of it.

I do not believe in God; his existence has been disproved by Science. But in the concentration camp, I learned to believe in men.

Science is organized knowledge. Wisdom is organized life.

Vulnerability is basically uncertainty, risk, and emotional exposure.

If we do discover a complete theory, it should be in time understandable in broad principle by everyone. Then we shall all, philosophers, scientists, and just ordinary people be able to take part in the discussion of why we and the universe exist.

It is in the admission of ignorance and the admission of uncertainty that there is a hope for the continuous motion of human beings in some direction that doesn’t get confined, permanently blocked, as it has so many times before in various periods in the history of man.

I call upon the scientific community in our country, those who gave us nuclear weapons, to turn their great talents now to the cause of mankind and world peace: to give us the means of rendering these nuclear weapons impotent and obsolete.

Today’s scientists have substituted mathematics for experiments, and they wander off through equation after equation, and eventually build a structure which has no relation to reality.

Some scientists believe climate change is the cause of unprecedented melting of the North Pole, and that effects these very uncertain weather patterns. I think we should listen to those scientists and experts.