GIGA THE MOST EXTENSIVE
COLLECTION OF
QUOTATIONS
ON THE INTERNET
Google
  Home  |   Biographical Index  |   Reading List  |   Search  |   Site Notes  |   Varying Hare Books  |
  GIGA Quotes  |   Quotes by Author  |   Authors by Date  |
TOPICS:          A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z
PEOPLE:    #   A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z

THEORIES
[ Also see Abstract Action Assertions Assumptions Belief Evidence Facts Hypotheses Metaphysics Opinion Philosophy Principles Proof Speculation Statistics Thought Truth ]

We all agree that your theory is crazy, but is it crazy enough?
      - Niels Henrik David Bohr

A theory has only the alternative of being right or wrong. A model has a third possibility: it may be right, but irrelevant.
      - Manfred Eigen,
        "The Physicist's Conception of Nature" edited by Jagdish Mehra

A theory can be proved by experiment; but no path leads from experiment to the birth of a theory.
      - Albert Einstein

It is the theory that decides what can be observed.
      - Albert Einstein

The scientific theorist is not to be envied. For Nature, or more precisely experiment, is an inexorable and not very friendly judge of his work. It never says "Yes" to a theory. In the most favorable cases it says "Maybe," and in the great majority of cases simply "No." If an experiment agrees with a theory it means for the latter "Maybe," and if it does not agree it means "No." Probably every theory will someday experience its "No"--most theories, soon after conception.
      - Albert Einstein,
        in Albert Einstein: The Human Side, by H. Dukas and B. Hoffman

Sometimes a scream is better than a thesis.
      - Ralph Waldo Emerson

The conceptions I have summarized here I first put forward only tentatively, but in the course of time they have won such a hold over me that I can no longer think in any other way.
      - Sigmund Freud,
        Civilization and Its Discontents

I dare say that I have worked off my fundamental formula on you that the chief end of man is to frame general propositions and that no general proposition is worth a damn.
      - Oliver Wendell Holmes, Jr.,
        written to Pollock, November 22, 1920, found in "Holmes-Pollock Letters," p. 59

A theory is no more like a fact than a photograph is like a person.
      - Edgar Watson Howe

A young boy is a theory, an old man is a fact.
      - Edgar Watson Howe

First, you know, a new theory is attacked as absurd; then it is admitted to be true, but obvious and insignificant; finally it is seen to be so important that its adversaries claim that they themselves discovered it.
      - William James

The moment a person forms a theory, his imagination sees in every object only the traits which favor that theory.
      - Thomas Jefferson

A theory must be tempered with reality.
      - Jawaharlal Nehru

A hypothesis is something which looks as if it might be true and were true, and which is capable of verification or refutation by comparison with facts.
      - Charles Sanders Peirce

Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the theory nor the problem which it was intended to solve.
      - Karl Popper

Theory helps us to bear our ignorance of facts.
      - George Santayana

In theory, there is no difference between theory and practice. But, in practice, there is.
      - Jan L.A. van de Snepscheut

Last Revised: 2007 January 1
Copyright © 1999-2007 John C. Shepard. All Rights Reserved.
The GIGA name and logo are trademarks registered in the U.S. Patent and Trademark Office by John C. Shepard.
 WWW.GIGA-USA.COM     Back to Top of Page 
Amazon Book Link
BUY BOOK ABOUT
QUOTATIONS
Amazon.com Link
BUY BOOK RELATED TO
THEORIES
SUPPORT GIGA
CLICK TO PURCHASE
 Amazon      Office Depot 
 Target      Field's 
CLICK TO CONTRIBUTE
 Honor System 
GIGA QUOTE LINKS
Top 100 Quotes
Worldwide Topsites
GIGA