I’m comfortable with the unknown — that’s the point of science. There are places out there, billions of places out there, that we know nothing about. And the fact that we know nothing about them...

He felt that he was still groping in the dark; he had chosen his path but kept looking back, wondering whether he had misread the signs, whether he should not have taken the other way.

In our reasonings concerning matter of fact, there are all imaginable degrees of assurance, from the highest certainty to the lowest species of moral evidence. A wise man, therefore, proportions his belief to the evidence.

Through positive thinking and related approaches, we seek the safety and solid ground of certainty, of knowing how the future will turn out, of a time in the future when we’ll be ceaselessly happy and...

Science says the first word on everything, and the last word on nothing.

Customers loves certainty, make sure you give it to them.

It can be a good thing if deeper theology, or philosophy, only makes one more uncertain. It may lead to a healthy doubt; he may throw his hands up saying, ‘God, I just don’t know...

This did not rise to the level of certainty which should be required for presidential speeches, and CIA should have ensured that it was removed,

There is no certainty about a resolution,

There is no certainty; there is only adventure.

Of course, I don’t know everything. Considering the infinite amount of knowledge that one could acquire in a virtually innumerable array of intellectual disciplines, it’s probably more accurate to say that I don’t know anything.

Certain people, people who are certain, are always wrong—and that itself is certainly wrong because it’s always always.

Nothing is certain when it comes to the ways of women, of that I’m sure.

You can, as a Utah company — or a Silicon Valley company with a Utah operation — rest with some certainty that you will have power,

[Mathematics] is security. Certainty. Truth. Beauty. Insight. Structure. Architecture. I see mathematics, the part of human knowledge that I call mathematics, as one thing—one great, glorious thing. Whether it is differential topology, or functional analysis,...

But at that moment she had known, with a certainty she would never feel about anything else in her life, that it was right, that she wanted this man in her life. Something inside her...

Every time he tried to reconstruct the internal arguments that had led to his decision, they sounded feebler to him.

It seems a nailed-on certainty that the Bank of England will hold interest rates steady on Thursday,

…but the loss of a memory, like the omission of a phrase during reading, rather than making for uncertainty, can lead to a premature certainty.

It (trying to keep the law) grants you the power to judge others and feel superior to them. You believe you are living to a higher standard than those you judge. Enforcing rules, especially in...

A certain way to have financial security in life is not enough savings, but enough ability.

It is a noble responsibility to not back down when you know that you know that you know that you are right.

The good news is that we’ve needed the certainty of the numbers, and these numbers are in line with what we thought.

Miracles are like murders. After the first one, each becomes easier than the last for, with each success, the miracle-worker’s certainty in himself becomes stronger.

There is no such uncertainty as a sure thing.

The only thing I know for sure is how much I do not know.

If we begin with certainties, we shall end in doubts; but if we begin with doubts, and are patient in them, we shall end in certainties.

Like the body craves oxygen, the mind is desperate for certainty. It believes that without a safe foothold on reality, it will die.But the fascinating thing is that the illusion of certainty is exactly the...

All life is preoccupied with death. Death is the only certain future. Yet in the face of reason, everyone holds out hope for the highly improbable.

The great systems that inform the world about the truth and life invariably claim to be absolutely truthful and well-balanced. In reality they are quaking bridges built out of yearning.

I am not accustomed to saying anything with certainty after only one or two observations.

The devil’s happy when the critics run you off.

I believe that we do not know anything for certain, but everything probably.

If you build the faith to trust a friend as God, then your heart can never be broken.

I like the scientific spirit—the holding off, the being sure but not too sure, the willingness to surrender ideas when the evidence is against them: this is ultimately fine—it always keeps the way beyond open—always...

Stop living the life with possibilities and probabilities, live the life with certainties.

He who asserts belief with absolute certainty knows nothing of faith and makes himself into a fool. He who is wise, upon realizing they have done this, recants and searches themselves for further enlightenment.

In the Congress of the United States, Cromwell had known a good many men who were possessed of absolute certainty, and this he feared so much that he felt the only real and enduring evil...

I remember, in no particular order:—a shiny inner wrist;—steam rising from a wet sink as a hot frying pan is laughingly tossed into it;—gouts of sperm circling a plughole, before being sluiced down the full...

I could see it all. The hand on the shoulder, then the hug. The mouths that find each other through the tears, the moment when guilt and the certainty that things must go no further...

Knowledge is so comforting, but so is mystery.

Deeply convinced of the reality of the divine will, he (Lincoln) had no patience at all with any who were perfectly sure they knew the details of the divine will.

You never really know. Lately Kevin has been bothering himself with the idea that nothing is certain, nothing can be proven. Not one thing, not in all the world. The sun will rise tomorrow. Prove...

The future is certain. It is just not known.

We ought to regard the present state of the universe as the effect of its antecedent state and as the cause of the state that is to follow. An intelligence knowing all the forces acting...

Doubt is not a pleasant condition but certainty is an absurd one.

My confidence is in the idea that I may be wrong on this or that. No man in this life should ever have to bear the burden of perfection.

There you go again, declaring the exact inverse of your experience. You human pups are so full of the things you’re sure of. Sit down and listen for a change.

If anyone doesn’t agree with you, the truth is on your side.

These measures should restore consumer confidence and bring certainty to the market,