Even for practical purposes theory generally turns out the most important thing in the end. (Quote by - Oliver Wendell Holmes)

My theory is that if you look confident you can pull off anything - even if you have no clue what you're doing. (Quote by - Jessica Alba)

I cannot help fearing that men may reach a point where they look on every new theory as a danger, every innovation as a toilsome trouble, every social advance as a first step toward revolution, and that they may absolutely refuse to move at all. (Quote by - Alexis de Tocqueville)

All theory is against freedom of the will; all experience for it. (Quote by - Samuel Johnson)

I would say that, intellectually, Catholicism had no more impact on me than did social theory. (Quote by - Paul Farmer)

Christianity is not a theory or speculation, but a life; not a philosophy of life, but a life and a living process. (Quote by - Samuel Taylor Coleridge)

He had a theory, Walt did, that the religious life, and all the agony that goes with it, is just something God sics on people who have the gall to accuse Him of having created an ugly world. (Quote by - J. D. Salinger)

A theory has only the alternative of being right or wrong. A model has a third possibility - it may be right but irrelevant. (Quote by - Manfred Eigen)

Democracy is beautiful in theory; in practice it is a fallacy. (Quote by - Benito Mussolini)

Religion is essentially the art and the theory of the remaking of man. Man is not a finished creation. (Quote by - Edmund Burke)

Thought and theory must precede all salutary action; yet action is nobler in itself than either thought or theory. (Quote by - Virginia Woolf)

Morality is the theory that every human act must be either right or wrong, and that 99 % of them are wrong. (Quote by - H. L. Mencken)

It doesn't matter how beautiful your theory is, it doesn't matter how smart you are. If it doesn't agree with experiment, it's wrong. (Quote by - Richard P. Feynman)

The whole theory of the universe is directed unerringly to one single individual. (Quote by - Walt Whitman)

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. (Quote by - Thomas A. Edison)

Entropy theory, on the other hand, is not concerned with the probability of succession in a series of items but with the overall distribution of kinds of items in a given arrangement. (Quote by - Rudolf Arnheim)

My theory is that all of Scottish cuisine is based on a dare. (Quote by - Mike Myers)

Now the truth of the matter is that there are a lot of things people don't understand. Take the Einstein theory. Take taxes. Take love. Do you understand them? Neither do I. But they exist. They happen. (Quote by - Dalton Trumbo)

My theory has always been, that if we are to dream, the flatteries of hope are as cheap, and pleasanter, than the gloom of despair. (Quote by - Thomas Jefferson)

We must respect the other fellow's religion, but only in the sense and to the extent that we respect his theory that his wife is beautiful and his children smart. (Quote by - H. L. Mencken)

The Dell Theory of Conflict Prevention argues that no two countries that are both part of the same global supply chain will ever fight a war as long as they are each part of that supply chain. (Quote by - Thomas Friedman)

Without revolutionary theory there can be no revolutionary movement. (Quote by - Vladimir Lenin)

I think also of my colleagues in elementary particle theory in many lands, and feel that in some measure I am here as a representative of our small, informal, international fraternity. (Quote by - Murray Gell-Mann)

In order to shake a hypothesis, it is sometimes not necessary to do anything more than push it as far as it will go. (Quote by - Denis Diderot)

An argument fatal to the communist theory, is suggested by the fact, that a desire for property is one of the elements of our nature. (Quote by - Herbert Spencer)