Would you bet your paycheck on a weather forecast for tomorrow? If not, then why should this country bet billions on global warming predictions that have even less foundation?

What is the use of a house if you haven’t got a tolerable planet to put it on?

We sail within a vast sphere, ever drifting in uncertainty, driven from end to end.

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

There are GMO skeptics more in Europe maybe than in other places, but not exclusively.

You can’t learn in school what the world is going to do next year.

Nobody believes in completely unadulterated capitalism.

If there’s one thing that’s certain in business, it’s uncertainty.

All formal dogmatic religions are fallacious and must never be accepted by self-respecting persons as final.

The thing that’s made me open my eyes to what was happening to the environment and climate was films and documentaries.

I mean, people aren’t continuing like this and not doing anything because they are evil, or because they don’t want to. We aren’t destroying the biosphere because we are selfish. We are doing it simply because we are unaware.

People tell me that they are so hopeful when they see me and other children ‚school-striking,‘ and they say, ‚Oh the children are going to save us.‘ But no, we aren’t. We are too young to be able to do that. We don’t have time to wait for us to grow up and fix this in the future.

Although our intellect always longs for clarity and certainty, our nature often finds uncertainty fascinating.

The truth is you don’t know what is going to happen tomorrow. Life is a crazy ride, and nothing is guaranteed.

Before I do a stunt, I have to make sure it is safe.

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

Yeah, it’s pretty hard not to be completely cynical these days.

Nothing fortifies scepticism more than the fact that there are some who are not sceptics; if all were so, they would be wrong.

I think that when we know that we actually do live in uncertainty, then we ought to admit it; it is of great value to realize that we do not know the answers to different questions. This attitude of mind – this attitude of uncertainty – is vital to the scientist, and it is this attitude of mind which the student must first acquire.

Indecision may or may not be my problem.

I want to marry Arline because I love her – which means I want to take care of her. That is all there is to it. I want to take care of her. I am anxious for the responsibilities and uncertainties of taking care of the girl I love.

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

People are skeptical of many televangelists, and I’m sensitive to that.

We fear that this moment will end, that we won’t get what we need, that we will lose what we love, or that we will not be safe. Often, our biggest fear is the knowledge that one day our bodies will cease functioning. So even when we are surrounded by all the conditions for happiness, our joy is not complete.

There’s always going to be people who don’t understand or accept the united science, and I will just ignore them, as I’m only acting and communicating on the science.

There are too many accidents that can befall life on a single planet.

First, how do we give everyone a fair shot at opportunity and security in this new economy? Second, how do we make technology work for us, and not against us – especially when it comes to solving urgent challenges like climate change? Third, how do we keep America safe and lead the world without becoming its policeman?

I’m an atheist.

What can be asserted without evidence can be dismissed without evidence.

I would love to encourage all my teammates to eat the best way they possibly can. High school athletes. Now, that’s not the way our food system in America is set up. It’s very different. They have a food pyramid, and I disagree with that. I disagree with a lot of things that people tell you to do.

Fix reason firmly in her seat, and call to her tribunal every fact, every opinion. Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blindfolded fear.

It is dangerous to be right in matters on which the established authorities are wrong.

I am not deeply involved in Australian politics but I know there are prime ministers, governments around the world who are not acting responsibly in relation to climate change.

We misjudge risk if we feel we have some control over it, even if it’s an illusory sense of control.

Younger people have greatest fears. Why is that? Because they don’t know the plot. They don’t know their own individual plot… they don’t know what’s going to happen to them.

Though men determine, the gods doo dispose: and oft times many things fall out betweene the cup and the lip.

The first two games for Churchill, I was so jittery that I didn’t know what to do. I was running more but didn’t know what to do. I’ve no bones accepting the fact that I didn’t know what was happening in the game.

There is no hope unmingled with fear, and no fear unmingled with hope.

No great deed is done by falterers who ask for certainty.

We are ready for any unforeseen event that may or may not occur.

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

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’m skeptical of any mission that has advertisers at its centerpiece.

The future is called ‚perhaps‘, which is the only possible thing to call the future. And the important thing is not to allow that to scare you.

It’s no exaggeration to say that the undecideds could go one way or another.

From the time I was a kid, I always knew something was going to happen to me. Didn’t know exactly what.

This is the first age that’s ever paid much attention to the future, which is a little ironic since we may not have one.

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.

A question that sometimes drives me hazy: am I or are the others crazy?

The Lord can give, and the Lord can take away. I might be herding sheep next year.

I have written too much history to have faith in it; and if anyone thinks I’m wrong, I am inclined to agree with him.

Trust, but verify.

Avoiding climate breakdown will require cathedral thinking. We must lay the foundation while we may not know exactly how to build the ceiling.

A wet spot on the floor kind of put a scare in myself, so you never know inside those lines what might happen.

Fortune brings in some boats that are not steered.

I’m not a fortune-teller.

I’m a radical environmentalist; I think the sooner we asphyxiate in our own filth, the better. The world will do better without us. Maybe some fuzzy animals will go with us, but there’ll be plenty of other animals, and they’ll be back.

Remember that life’s big changes rarely give advance warning.

My dear wife has, I would say, probably never opened a religious book, and seems to be one of those people to whom the whole idea is utterly remote and absurd.

The root of all superstition is that men observe when a thing hits, but not when it misses.

What prudent merchant will hazard his fortunes in any new branch of commerce when he knows not that his plans may be rendered unlawful before they can be executed?