Welcome to our curated collection of assumption quotes! We don't assume but we hope that you will enjoy pondering them. Please share widely. Please link back to us.

Ignorance is brought about by assumption.

--T. D. Jakes

Assumptions are the most damaging enemies of our mind's equilibrium...An assumption is an imaginary truth.

--A.A. Alebraheem

Until we know the assumptions in which we are drenched, we cannot know ourselves.

--Adrienne Rich

I have often had occasion to notice how, where a direct question would fail to elicit a response, a false assumption brings instant information in the form of a contradiction.

--Agatha Christie

And just as the false assumption that we are not connected to the earth has led to the ecological crisis, so to the equally false assumption that we are not connected to each other that has led to our social crisis.

--Al Gore

Ask questions; don't make assumptions.

--Angela Ahrendts

Differences challenge assumptions.

--Anne Wilson Schaef

Troubles always ensue when assumptions clash, when expectations do not match.

--Anneli Rufus

Assumptions are unopened windows that foolish birds fly into, and their broken bodies are evidence gathered too late.

--Bryan Davis

Assumptions are dangerous things to make, and like all dangerous things to make, bombs, for instance, or strawberry shortcake, if you make even the tiniest mistake you can find yourself in terrible trouble.

--Daniel Handler

A lot of our assumptions of the world are fairly cynical, fairly negative, and assume the worst. What our reading tastes show -- in this rush to fantasy, romance, whatever -- is that we actually still want to believe in a world of possibility, in a world of mystery.

--Deborah Harkness

Most deadly errors arise from obsolete assumptions.

--Frank Herbert

The assumption of perfect knowledge is very far from reality a lot of the evil in the world is actually not intentional.

--George Soros

Assumptions are the termites of relationships.

--Henry Winkler

You think you know this story.
You do not.

--Jane Yolen

My way of thinking as I approach any human being on this planet is, 'What are you doing now?' That's what interests me. I don't come at anybody with a whole bunch of assumptions.

--John Lydon

It is useless to attempt to reason a man out of a thing he was never reasoned into.

--Jonathan Swift

Untested assumptions and lazy habits of thought can be shown up, once put in a spotlight of a different hue.

--Julian Baggini

You can see that it is better not to make too many assumptions, particularly in the morning.

--Lemony Snicket

Making assumptions simply means believing things are a certain way with little or no evidence that shows you are correct, and you can see at once how this can lead to terrible trouble.

--Lemony Snicket

Most of our assumptions have outlived their uselessness.

--Marshall McLuhan

The assumption of an absolute determinism is the essential foundation of every scientific enquiry.

--Max Planck

We make the assumption that everyone sees life the way we do.

--Miguel Angel Ruiz

Don't make assumptions.

--Miguel Angel Ruiz

It is always better to ask then to make an assumption.

--Miguel Angel Ruiz

We make all sorts of assumptions because we don't have the courage to ask questions.

--Miguel Angel Ruiz

We are going to make assumptions; that's what humans do. Since most assumptions are flawed, err on the positive side. Always assume the best.

--Richelle E. Goodrich

You must never assume that what people say or do in a particular moment is a statement of their permanent desires.

--Robert Greene

Physics is based on the assumption that certain fundamental features of nature are constant.

--Rupert Sheldrake

Assumptions are quick exits for lazy minds that like to graze out in the fields without bother.

--Suzy Kassem

If you start a conversation with the assumption that you are right or that you must win, obviously it is difficult to talk.

--Wendell Berry

The explanation requiring the fewest assumptions is most likely to be correct.

--William of Ockham

If you challenge your own, you won't be so quick to accept the unchallenged assumptions of others.

--Alan Alda

Be careful of what you assume, what you assume often becomes what you consume.

--Constance Friday

The inability to move from one phase of life and change one's self-identity is, the anxiety of always.

--Sherry Turkle

People generally deal with situations by means of assumptions.

--Idries Shah

I navigate different cultures daily, and I understand how people can make false assumptions because of their lack of interaction with the cultures I find myself in. But if they don't frequent these spaces much, how can they rush to judgment?


If we worked on the assumption that what is accepted as true really is true, then there would be little hope for advance.

--Orville Wright

I'm often reassured in a bizarre -- perhaps perverse -- way when I find in the archive stuff that contradicts what my assumptions have been. That's interesting and exciting.

--Antony Beevor

Start with the assumption that the best way to do something is not the way it's being done right now.

--Aaron Levie

You can't make assumptions when you're dealing with health issues.

--Adam Clayton

The constant assumption runs throughout the law that the natural and spontaneous evolutions of habit fix the limits of right and wrong.

--Benjamin Cardozo

If the assumptions used in calculating energy are changed, then this seriously affects the final result, even though the same body of data might be used.

--Charles Francis Richter

It's not the things you don't know that trip you up. It's the things you think you know, but you don't. You fail to ask a certain question because you believe you know the answer. Separating your information from your assumptions can be very tricky business.

--Claudia Gray

The assumption is that your personal life has to be a mess to create, but how much chaos can you allow in before it takes over?

--David Byrne

Society cannot continue to disable themselves through their need to categorize people or make assumptions as to another individual's abilities.

--Evelyn Glennie

Euclid taught me that without assumptions there is no proof. Therefore, in any argument, examine the assumptions.

--E. T. Bell

When there is a problem, always identify and evaluate your underlying assumptions that may be contributing to the problem or preventing you from seeing the problem clearly.

--Elizabeth Thornton

If we are honest with ourselves, we have to admit that sometimes our assumptions and preconceived notions are wrong, and therefore, our interpretation of events is incorrect. This causes us to overreact, to take things personally, or to judge people unfairly.

--Elizabeth Thornton

Every economic opinion is associated with a set of assumptions.

--Gautam Adani

Still, intuitive assumptions about behavior is only the starting point of systematic analysis, for alone they do not yield many interesting implications.

--Gary Becker

To understand a phenomenon, we need to make sure we understand the shape of its curve. By assuming we know how a curve continues beyond what we see, we will draw the wrong conclusions and come up with the wrong solutions.

--Hans Rosling

Any dominant ideology operates off the assumption that what it has to say is unaccountable and unquestionable.

--Henry Giroux

I started to think about the assumptions we make that everyone we meet operates under the same moral code, and how betrayed we feel when that isn't the case.

--Jane Green

Assumptions allow the best in life to pass you by.

--John Sayles

If you look at the history of big obstacles in understanding our world, there's usually an intuitive assumption underlying them that's wrong.

--Jeff Hawkins

Having our fundamental assumptions about life challenged is never a comfortable thing.

--Maajid Nawaz

We have all these cultural assumptions about love. People get hurt, and we say, 'Oh, it's no one's fault.'

--Mona Simpson

I think it's the expectations and assumptions of others that cause heartache.

--Paul Thomas Anderson

Our enemy is fear. Blinding, reason-killing fear. Fear consumes the truth and poisons all the evidence, leading us to false assumptions and irrational conclusions.

--Rick Yancey

The law requires more than an assumption, the law requires a fact.

--Robert Bolt

Question every assumption and go towards the problem, like the way they flew to the moon. We should have more moon shots and flights to the moon in areas of societal importance.

--Sebastian Thrun

It's sad that we never get trained to leave assumptions behind.

--Sebastian Thrun

The assumption must be that those who can see value only in tradition, or versions of it, deny man's ability to adapt to changing circumstances.

--Stephen Bayley

I'm about challenging people. Like, properly challenging them and their assumptions.

--Steven Rodney McQueen

If you're black in America, race is a factor in your life. Start with that assumption.

--Henry Hampton

Society is based on the assumption that everyone is alike and no one is alive.

--Hugh Kingsmill

Hmmm.... supposing is a dangerous practice.

--Neal Stephenson

To assume is to presume.

--Jude Morgan

Instead of trying to group people into something and have this one assumption, get to know someone for who they are. I guess a lot of people are really lazy to start getting to know people or make that effort.

--Amber Liu

We never look beyond our assumptions and what's worse, we have given up trying to meet others; we just meet ourselves.

--Muriel Barbery

But you are making assumptions without all the facts, and that's not a sign of intelligence.

--C.C. Hunter

Assumptions are usually presumptuous but often correct.

--Walter Darby Bannard

Revealed insights should leave us stricken with the knowledge of how little we really know. It should never lead to an emotional arrogance based upon a false assumption that we somehow have all the answers -- that we in fact have a corner on truth. For we do not.

--Hugh B. Brown

Don't build roadblocks out of assumptions.

--Lorii Myers

It is not really wise to make too many assumptions when you don't yet have all the facts to do so. You may believe your conclusions are logical, while they may turn out to be totally wrong.

--Sahara Sanders

Even if we hear something and we don't understand we make assumptions about what it means and then believe the assumptions.

--Don Miguel Ruiz

If others tell us something we make assumptions, and if they don't tell us something we make assumptions to fulfill our need to know and to replace the need to communicate.

--Don Miguel Ruiz

Longer Version:

If others tell us something we make assumptions, and if they don't tell us something we make assumptions to fulfill our need to know and to replace the need to communicate. Even if we hear something and we don't understand we make assumptions about what it means and then believe the assumptions. We make all sorts of assumptions because we don't have the courage to ask questions.

The problem with making assumptions is that we believe they are the truth. We could swear they are real.

--Don Miguel Ruiz

It's always your assumptions about you, about others, about future that make reality worse than it actually is.

--Dragos Bratasanu, Ph.D.

New ideas can be supremely bad ideas, and by the time people realize how bad they are, it is sometimes difficult to get rid of them.

--Alister E. McGrath

The assumption that everyone in government is a bad actor imperils our democracy.

--Asha Rangappa

The assumption that what currently exists must necessarily exist is the acid that corrodes all visionary thinking.

--Murray Bookchin

Assuming can trip us up in other ways too. It can stop us seeing people for who they really are and make us lose sight of the people we know.

--C.J. Tudor

Never assume, my dad once told me. To assume makes an 'ass' out of 'u' and 'me'.

--C.J. Tudor

You can never make an assumption about the conversation you are about to have with somebody. People will always surprise you, which is what keeps you on your toes.

--Nicky Morgan

Most of us make assumptions about how someone will relate to us, and they are often unfounded.

--Michele Jennae

I know assuming is easy, and sometimes, reality does not go in the direction of the assumption, but at least, it gives us hope that things may go just right.

--Aishah Madadiy

If you leave assumptions lying around unchallenged and uncorrected, it isn't long before they morph into facts.

--Kiran Manral

The assumption that seeing is believing makes us susceptible to visual deceptions.

--Kathleen Hall Jamieson

Assumptions are maintained by the hug of history. Yet, history does not guarantee their validity, nor does it ever reassess their validity.

--Michael Michalko

The assumption that anything true is knowable is the grandfather of paradoxes.

--William Poundstone

Always assume your assumptions about others are wrong. Because often, they are.

--Savania China

The criterion of simplicity requires that the minimum number of assumptions be postulated.

--Albert Low

A theory's assumptions always are and ought to be unrealistic. Further, we should attempt to make them more unrealistic in order to increase a theory's fruitfulness.

--Satoshi Kanazawa

Listen with an open mind, gather all the incoming information, both verbal and non-verbal and be careful not to ignore things you don't wish to hear. Don't make assumptions or jump to conclusions. The punchline usually comes at the end!

--Graham Speechley

Move beyond the old assumptions, practices, and language that can be barriers to equal access.

--Frances Hesselbein

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