Top 1050 Theories Quotes & Sayings

Anyone who has examined into the history of the theories of earth evolution must have been astounded to observe the manner in which the unique and the difficultly explainable has been made to take the place of the common and the natural in deriving the framework of these theories.

Professors in every branch of the sciences, prefer their own theories to truth: the reason is that their theories are private property, but truth is common stock.

Whoever has the mind stuffed with theories and more theories, suffers horribly because he is unable to realize nothing of what they have read.

I have lived among enough painters and around studios to have had all the theories - and how contradictory they are - rammed down my throat. A man has to have a gizzard like an ostrich to digest all the brass-tacks and wire nails of modern art theories.

Beware of color theories. Theories in color photography are dangerous. The plain fact that there are so many of them proves my point.

There will be well-testable theories, hardly testable theories, and non-testable theories. Those which are non-testable are of no interest to empirical scientists. They may be described as metaphysical.

It is rational to choose the right means to your ends to develop very elegant abstract formal theories of rational choice, and then turn these into what look like moral theories. Philosophers tend to be ravished by the formal beauty of such theories, and they don't pay much attention to the fact that our human limitations make them pretty useless in practice, while the simple point about instrumental reasoning is too shallow to be of much real moral interest.

You make observations, write theories to fit them, try experiments to disprove the theories and, if you can't, you've got something.

Methodological naturalism gives advice to scientists about what they should include in their theories. There is a second type of methodological naturalism that gives advice to philosophers, which I call "methodological naturalismp." It says that the methods that philosophers should use in assessing philosophical theories are limited to the methods that scientists ought to use in assessing scientific theories.

Theories by women about women have only recently begun to appear in print. Theories by men about women are abundant.

But some of these theories are so bold that they can clash with reality: they are the testable theories of science. And when they clash, then we know that there is a reality; something that can inform us that our ideas are mistaken.

Stories are the untested, uninvestigated theories that tell us what all these things mean. We don’t even realize that they’re just theories.

Man is so intelligent that he feels impelled to invent theories to account for what happens in the world. Unfortunately, he is not quite intelligent enough, in most cases, to find correct explanations. So that when he acts on his theories, he behaves very often like a lunatic.

Generally the theories we believe we call facts, and the facts we disbelieve we call theories.

One of the greatest sources of problems in our society arises from people having loads of wrong theories in their heads - often theories that are critical of others - that they won't test by speaking to the relevant people about them. Instead, they talk behind people's backs, which leads to pervasive misinformation.

The wise man regulates his conduct by the theories both of religion and science. But he regards these theories not as statements of ultimate fact but as art-forms.

Evolution has long been badly taught. In particular, students - and even professional biologists - acquire theories of evolution without any deep understanding of what problem these theories attempt to solve. They learn but little of the evolution of evolutionary theory.

Art is very mysterious. I wonder if you can really do any damage to art. I think that when we're writing, something comes through or should come through, in spite of our theories. So theories are not really important.

I noticed affixed to a laboratory door the following words: "Les théories passent. Le Grenouille reste. [The theories pass. The frog remains.] &mdashJean Rostand, Carnets d'un biologiste." There is a risk that in the less severe discipline of criticism the result may turn out to be different; the theories will remain but the frog may disappear.

Facts and theories are different things, not rungs in a hierarchy of increasing certainty. Facts are the world's data. Theories are structures of ideas that explain and interpret facts. Facts do not go away while scientists debate rival theories for explaining them. Einstein's theory of gravitation replaced Newton's, but apples did not suspend themselves in mid-air pending the outcome.

It is true that the grasping of truth is not possible without empirical basis. However, the deeper we penetrate and the more extensive and embracing our theories become the less empirical knowledge is needed to determine those theories.

Theory is a dirty word in some managerial quarters. That is rather curious, because all of us, managers especially, can no more get along without theories than libraries can get along without catalogs and for the same reason: theories help us make sense of incoming information.

Leave your theories. All theories, you see, even those of virtue, are bad, foolish, mischievous.

Because those who hold conspiracy theories typically suffer from a crippled epistemology, in accordance with which it is rational to hold such theories, the best response consists in cognitive infiltration of extremist groups. Various policy dilemmas, such as the question whether it is better for government to rebut conspiracy theories or to ignore them, are explored in this light.

Theories of evolution must provide for the creative acts which brought such theories into existence.

There are varieties of theories of revolution. According to one of these theories, only one of these theories, revolutions occur when there is an explosion of rising expectation. And amongst the lower strata in Iranian society, we are witnessing an increasing rise of the expectation and it's clear that the regime is incapable of satisfying these demands.

Conspiracy theories themselves are big business, of course, selling books, videos, conferences, and all kinds of merch. Then there is the economy that promotes conspiracy theories to sell goods such as supplements, survival gear, and yes, bunkers.

Scientific theories need reconstruction every now and then. If they didn't need reconstruction they would be facts, not theories. The more facts we know, the less radical become the changes in our theories. Hence they are becoming more and more constant. But take the theory of gravitation; it has not been changed in four hundred years.

Superstring theories provide a framework in which the force of gravity may be united with the other three forces in nature: the weak, electromagnetic and strong forces. Recent progress has shown that the most promising superstring theories follow from a single theory. For the last generation, physicists have studied five string theories and one close cousin. Recently it has become clear that these five or six theories are different limiting cases of one theory which, though still scarcely understood, is the candidate for superunification of the forces of nature.

It is our hope, that men in proportion as they grow more enlightened, will learn to hold their theories and their creeds more loosely, and will none the less, nay, rather all the more be devoted to the supreme end of practical righteousness to which all theories and creeds must be kept subservient.

Even mistaken hypotheses and theories are of use in leading to discoveries. This remark is true in all the sciences. The alchemists founded chemistry by pursuing chimerical problems and theories which are false. In physical science, which is more advanced than biology, we might still cite men of science who make great discoveries by relying on false theories.

Were I disposed to consider the comparative merit of each of them [facts or theories in medical practice], I should derive most of the evils of medicine from supposed facts, and ascribe all the remedies which have been uniformly and extensively useful, to such theories as are true. Facts are combined and rendered useful only by means of theories, and the more disposed men are to reason, the more minute and extensive they become in their observations

Facts quite often, I fear to confess, like lawyers, put me to sleep at noon. Not theories, however. Theories are invigorating and tonic. Give me an ounce of fact and I will produce you a ton of theory by tea this afternoon. That is, after all, my job.

Men who believe too firmly in their theories, do not believe enough in the theories of others. So ... these despisers of their fellows ... make experiments only to destroy a theory, instead of to seek the truth.

Some philosophers think that the idea of a consequentialist virtue theory is strange, but the real strength of consequentialism is that it can emulate the requirements of other moral theories when it is the case that acting on those theories would improve the world.

Managers are already voracious consumers of theory. Every time they make a decision or take action, it's based on some theory that leads them to believe that action will lead to the right result. The problem is, most managers aren't aware of the theories they're using, and they often use the wrong theories for the situation.

The average, vague understanding of being can be permeated by traditional theories and opinions about being in such a way that these theories, as the sources of the prevailing understanding, remain hidden.

It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.

We lay down a fundamental principle of generalization by abstraction: The existence of analogies between central features of various theories implies the existence of a general theory which underlies the particular theories and unifies them with respect to those central features.

Facts do not speak for themselves. They speak for or against competing theories. Facts divorced from theories or visions are mere isolated curiosities.

People want to think of economics as a natural science, like physics, with the comforting reliability of simple-to-understand theories like F=MA. Unfortunately, it isn't. Economics is a social science, and the so-called theories are really social and moral constructs.

A theory not only explains the world we see, it lets us imagine other worlds, and, even more significantly, lets us act to create those worlds. Developing everyday theories, like scientific theories, has allowed human beings to change the world.

The menstruation taboo is ancient, and there are so many theories about it. For some, it is fear of blood, and for some, period blood is toxic. If you read the theories about menstruation, you might even laugh.

True art is creation, and creation is beyond all theories. That is why I say to any beginner: Learn your theories as well as you can, but put them aside when you touch the miracle of the living soul. Not theories but your own creative individuality alone must decide.

One of the most difficult features of direct experience is that it is unfiltered by any theories or expectations. It's hard to observe without imposing a theory to explain what we're seeing, but the trouble with theories, as Einstein said, is that they explain not only what is observed, but what can be observed. We start to build expectations based on our theories.

We are more heavily invested in the theories of failure than we are in the theories of success.

Theories are like a stairway; by climbing, science widens its horizon more and more, because theories embody and necessarily include proportionately more facts as they advance.

Propose theories which can be criticized. Think about possible decisive falsifying experiments-crucial experiments. But do not give up your theories too easily-not, at any rate, before you have critically examined your criticism.

For the theory-practice iteration to work, the scientist must be, as it were, mentally ambidextrous; fascinated equally on the one hand by possible meanings, theories, and tentative models to be induced from data and the practical reality of the real world, and on the other with the factual implications deducible from tentative theories, models and hypotheses.

I love to read theories without ever using them when working... The paradoxical fact in the aesthetic is that theories are also true in reverse.

The central Christian belief is that Christ's death has somehow put us right with God and given us a fresh start. Theories as to how it did this are another matter. A good many different theories have been held as to how it works; what all Christians are agreed on is that it does work.

Before I got married I had six theories about bringing up children; now I have six children, and no theories.

Contrary to what professional economists will typically tell you, economics is not a science. All economic theories have underlying political and ethical assumptions, which make it impossible to prove them right or wrong in the way we can with theories in physics or chemistry.

It turns out, in fact, that 'theories of meaning' are typically not about meaning in an everyday or 'folk' sense at all. They are theories designed to compute the truth or assertibility conditions of sentences from their components.

The method of science depends on our attempts to describe the world with simple theories: theories that are complex may become untestable, even if they happen to be true. Science may be described as the art of systematic over-simplification-the art of discerning what we may with advantage omit.

Our minds are specifically adapted to developing certain theories, and we have a science if the theories that are available to our minds happen to be close to true. Well, there is no particular reason to suppose that the intersection of true theories and theories that are accessible to the mind is very large. It may not be very large.

You know what I'm intrigued by? Like, space and wormholes and Stephen Hawking's theories and Richard Dawkins's theories. That's what I care about.

Theories without facts may be barren, but facts without theories are meaningless.

There are 15 main theories in physics, and we know all of them. If there weren't a finite number of theories, there would not be a point to physics.

Before I married, I had three theories about raising children and no children. Now, I have three children and no theories.