If we have an atom that is in an excited state and so is going to emit a photon, we cannot say when it will emit the photon. It has a certain amplitude to emit the photon at any time, and we can predict only a probability for emission; we cannot predict the future exactly.

And no, we don’t know where it will lead. We just know there’s something much bigger than any of us here.

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

God not only plays dice, He also sometimes throws the dice where they cannot be seen.

My comedy is different every time I do it. I don’t know what the hell I’m doing.

We are like boxers, one never knows how much longer one has.

When God sneezed, I didn’t know what to say.

You know, people talk about this being an uncertain time. You know, all time is uncertain. I mean, it was uncertain back in – in 2007, we just didn’t know it was uncertain. It was – uncertain on September 10th, 2001. It was uncertain on October 18th, 1987, you just didn’t know it.

Our problem right now is that we’re so specialized that if the lights go out, there are a huge number of people who are not going to know what to do. But within every dystopia there’s a little utopia.

I don’t know where I’m going from here, but I promise it won’t be boring.

I don’t know what can be so dangerous about giving people hope.

There are many things that I don’t understand.

Indecision may or may not be my problem.

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

As soon as questions of will or decision or reason or choice of action arise, human science is at a loss.

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.

Every possession and every happiness is but lent by chance for an uncertain time, and may therefore be demanded back the next hour.

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

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

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

I used to get the feeling, and sometimes I still get it, that sometimes I was fooling somebody; I don’t know who or what, maybe myself.

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

He that waits upon fortune, is never sure of a dinner.

I will carry on writing, to be sure. But I don’t know if I would want to publish again after Harry Potter.

The woman that deliberates is lost.

‚Tis better to bear the ills we have than fly to others that we know not of.

Being on tour is like being in limbo. It’s like going from nowhere to nowhere.

Ironically, parenting is a shame and judgment minefield precisely because most of us are wading through uncertainty and self-doubt when it comes to raising our children.

To some extent I happily don’t know what I’m doing. I feel that it’s an artist’s responsibility to trust that.

Love and doubt have never been on speaking terms.

Part of the reason there’s an injunction to the truth, for example, is that if you’re in a circumstance of extreme uncertainty, your best weapon, let’s say, or your best tool or your best defense is the truth, because it keeps things simpler.

There is a time for departure even when there’s no certain place to go.

Risk comes from not knowing what you’re doing.

I always wonder when it was that I was embraced.

Prepare for the unknown by studying how others in the past have coped with the unforeseeable and the unpredictable.

I spent a lot of years trying to outrun or outsmart vulnerability by making things certain and definite, black and white, good and bad. My inability to lean into the discomfort of vulnerability limited the fullness of those important experiences that are wrought with uncertainty: Love, belonging, trust, joy, and creativity to name a few.

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.

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.

I never knew whether to pity or congratulate a man on coming to his senses.

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

Not knowing when the dawn will come I open every door.

Knowledge is knowing that we cannot know.

The uncertainty of parenting can bring up feelings in us that range from frustration to terror.

We are afraid to care too much, for fear that the other person does not care at all.

If a man will begin with certainties, he shall end in doubts, but if he will content to begin with doubts, he shall end in certainties.

I believe the most solemn duty of the American president is to protect the American people. If America shows uncertainty and weakness in this decade, the world will drift toward tragedy. This will not happen on my watch.

Either he’s dead or my watch has stopped.

It is only by risking our persons from one hour to another that we live at all. And often enough our faith beforehand in an uncertified result is the only thing that makes the result come true.

I cannot discover that anyone knows enough to say definitely what is and what is not possible.

For my part I know nothing with any certainty, but the sight of the stars makes me dream.

If you aren’t in the moment, you are either looking forward to uncertainty, or back to pain and regret.

I did used to have nightmares about the idea that when I die, there is a spark of consciousness which basically creates the world. ‚Is the world going to disappear if this spark of consciousness disappears? And how do I know it won’t? How do I know there’s anything there except what I’m conscious of?‘

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.

I’m very careful about saying who would and wouldn’t go to heaven. I don’t know.

You are 27 or 28 right? It is very tough to live at that age. When nothing is sure. I have sympathy with you.

Trying to understand the way nature works involves a most terrible test of human reasoning ability. It involves subtle trickery, beautiful tightropes of logic on which one has to walk in order not to make a mistake in predicting what will happen. The quantum mechanical and the relativity ideas are examples of this.

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.

I am no longer sure of anything. If I satiate my desires, I sin but I deliver myself from them; if I refuse to satisfy them, they infect the whole soul.

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

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

The most distressing thing that can happen to a prophet is to be proved wrong. The next most distressing thing is to be proved right.