Theory Quotes

400+ Sourced quotes

Isaac Asimov

Nicolaus Copernicus

David Bohm

George Boole

Max Born

Georges Cuvier

William O. Douglas

[Creationists] make it sound as though a "theory" is something you dreamt up after being drunk all night.

I can easily conceive, most Holy Father, that as soon as some people learn that in this book which I have written concerning the revolutions of the heavenly bodies, I ascribe certain motions to the Earth, they will cry out at once that I and my theory should be rejected.

Nicolaus Copernicus

By the theory of our Government majorities rule, but this right is not an arbitrary or unlimited one. It is a right to be exercised in subordination to the Constitution and in conformity to it. One great object of the Constitution was to restrain majorities from oppressing minorities or encroaching upon their just rights. Minorities have a right to appeal to the Constitution as a shield against such oppression.

Every theory is a self-fulfilling prophecy that orders experience into the framework it provides.

I know that a good many champions have entertained the thought that the more they discourage youngsters, the longer they would reign. However, this theory never impressed me, and I always made it a point to give youths the benefit of my experience in bicycle racing.

Marshall Taylor

But the nature of my main work in chemistry can be better represented by more than 280 English publications, of which roughly 200 concern the theory of chemical reactions and related subjects.

Mathematical science is in my opinion an indivisible whole, an organism whose vitality is conditioned upon the connection of its parts. For with all the variety of mathematical knowledge, we are still clearly conscious of the similarity of the logical devices, the relationship of the ideas in mathematics as a whole and the numerous analogies in its different departments. We also notice that, the farther a mathematical theory is developed, the more harmoniously and uniformly does its construction proceed, and unsuspected relations are disclosed between hitherto separate branches of the science. So it happens that, with the extension of mathematics, its organic character is not lost but only manifests itself the more clearly.

Every theory of love, from Plato down, teaches that each individual loves in the other sex what he lacks in himself.

G. Stanley Hall

Normal science, the activity in which most scientists inevitably spend most all their time, is predicated on the assumption that the scientific community knows what the world is like. Normal science often suppresses fundamental novelties because they are necessarily subversive of its basic commitments. As a puzzle-solving activity, normal science does not aim at novelties of fact or theory and, when successful, finds none.

The whole action of the laws tended to increase the number of consumers of food and to diminish the number of producers, was due the invention of the Malthusian theory of population.

Henry Charles Carey

Democracy is the theory that the common people know what they want, and deserve to get it good and hard.

It really is a nice theory. The only defect I think it has is probably common to all philosophical theories. It's wrong.

There is no falsification before the emergence of a better theory.

The rich possess ample means to realize any theory they may chuse to adopt in the education of their children, regardless of the cost; but it is not so with him whose Subsistence is derived from industry.

Joseph Lancaster

As for everything else, so for a mathematical theory: beauty can be perceived but not explained.

Quantum theory also tells us that the world is not simply objective; somehow it's something more subtle than that. In some sense it is veiled from us, but it has a structure that we can understand.

John Polkinghorne

But this is not to say that the society which inflicts capital punishment commits murder. Murder is an offensive act. The term cannot be applied legitimately to any defensive act. And capital punishment, however ineffective it may be and through whatever ignorance it may be resorted to, is a strictly defensive act,—at least in theory.

Benjamin Tucker

Probability is expectation founded upon partial knowledge. A perfect acquaintance with all the circumstances affecting the occurrence of an event would change expectation into certainty, and leave neither room nor demand for a theory of probabilities.

The implications of these considerations justify the statement that all empirically verifiable knowledge even the commonsense knowledge of everyday life - involves implicitly, if not explicitly, systematic theory in this sense.

Talcott Parsons

Men act like brutes in so far as the sequences of their perceptions arise through the principle of memory only, like those empirical physicians who have mere practice without theory.

Gottfried Wilhelm Leibniz

Theoretical approaches have their place and are, I suppose, essential but a theory must be tempered with reality.

Jawaharlal Nehru

The system becomes more coherent as it is further extended. The elements which we require for explaining a new class of facts are already contained in our system. Different members of the theory run together, and we have thus a constant convergence to unity. In false theories, the contrary is the case.

William Whewell

Believing that the power to destroy belongs to the Creator alone I affirm... that any theory which, when carried out, demands the annihilation of force, is necessarily erroneous.

James Prescott Joule

While gossip among women is universally ridiculed as low and trivial, gossip among men, especially if it is about women, is called theory, or idea, or fact.

In relativity, movement is continuous, causally determinate and well defined, while in quantum mechanics it is discontinuous, not causally determinate and not well defined. Each theory is committed to its own notions of essentially static and fragmentary modes of existence (relativity to that of separate events, connectable by signals, and quantum mechanics to a well-defined quantum state). One thus sees that a new kind of theory is needed which drops these basic commitments and at most recovers some essential features of the older theories as abstract forms derived from a deeper reality in which what prevails in unbroken wholeness.