Theory Quotes, Quotations, and Sayings

25 Theory Quotes
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“If the facts don't fit the theory, change the facts.”
Albert Einstein Quotes
“It is the theory that decides what can be observed”
Albert Einstein Quotes
“There is a theory which states that if ever for any reason anyone discovers what exactly the Universe is for and why it is here it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another that states that this has already happened.”
Douglas Adams Quotes
“Relativity applies to physics, not ethics”
Albert Einstein Quotes
“The theory seems to be that as long as a man is a failure he is one of God's children, but that as soon as he succeeds he is taken over by the Devil.”
Henry Louis Mencken Quotes
“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 Quotes
“He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast.”
Leonardo da Vinci Quotes
“How empty is theory in the presence of fact”
Mark Twain Quotes
“Our theories of the eternal are as valuable as are those which a chick which has not broken its way through its shell might form of the outside world.”
Buddha Quotes
“An ounce of action is worth a ton of theory.”
Friedrich Engels Quotes
“In order to shake a hypothesis, it is sometimes not necessary to do anything more than push it as far as it will go.”
Denis Diderot Quotes
“You cannot run a business, or anything else, on a theory.”
Harold S. Geneen Quotes
“In theory there is no difference between theory and practice. In practice there is.”
Yogi Berra Quotes
“Life is so unlike theory.”
Anthony Trollope Quotes
“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 Quotes
“Let us work without theorizing, 'Tis the only way to make life endurable.”
Voltaire Quotes
“A young boy is a theory, an old man is a fact.”
Ed Howe Quotes
“Many things difficult to design prove easy to performance.”
Samuel Johnson Quotes
“[Do not] put too much confidence in experimental results until they have been confirmed by theory.”
Sir Arthur Eddington Quotes
“I never once made a discovery ... I speak without exaggeration that I have constructed three thousand different theories in connection with the electric light ... Yet in only two cases did my experiments prove the truth of my theory.”
Thomas A. Edison Quotes
“A theory is no more like a fact than a photograph is like a person.”
Ed Howe Quotes
“In scientific work, those who refuse to go beyond fact rarely get as far as fact.”
Thomas Huxley Quotes
“Conjecture as to things useful, is good; but conjecture as to what it would be useless to know, is very idle.”
Samuel Johnson Quotes
“There can be no theory of any account unless it corroborate with the theory of the earth.”
Walt Whitman Quotes
“Science is organized common sense where many a beautiful theory was killed by an ugly fact.”
Thomas Huxley Quotes