A Quote by Kurt Lewin

There is nothing so practical as a good theory. — © Kurt Lewin
There is nothing so practical as a good theory.
Nothing is more practical than a good theory.
There is nothing more practical than a good theory.
The theory of our modern technic shows that nothing is as practical as theory.
I make a distinction between theory and methodology, the latter being the practical deployment of a premise. Theory on the contrary may well be applied, hence becomes methodology without a hitch, but isn't necessarily practical at all.
The most practical solution is a good theory.
Jefferson's Declaration of Independence is a practical document for the use of practical men. It is not a thesis for philosophers, but a whip for tyrants; it is not a theory of government but a program of action.
But actually theory is very practical. Gravity is a theory, for example. It allows you to predict that if you step off a cliff you will fall; you don't have to collect data on that.
I do not think much of the good luck theory of self-made men. It is worth but little attention and has no practical value.
If the theory accurately predicts what they [scientists] see, it confirms that it's a good theory. If they see something that the theory didn't lead them to believe, that's what Thomas Kuhn calls an anomaly. The anomaly requires a revised theory - and you just keep going through the cycle, making a better theory.
Because the true perfection of a practical occupation consists not only in knowing the actual performance of the occupation but also in its explanation, why the work is done a in a particular way, and because the art of calculating is a practical occupation, it is clear that it is pertinent to concern oneself with the theory.
I picked economics at the end of my undergraduate time because it seemed to be a really nice combination of theory, including mathematical theory on one hand, and things that are quite practical that you can touch and see and feel. So I picked it, and I consciously thought of it as an experiment to see if I liked it. And it worked.
The Cabal is of two kinds, theoretical and practical, with the practical Cabala, which is engaged in the construction of talismans and amulets, we have nothing to do. The theoretical is divided into the lineal and dogmatic. The dogmatic is nothing more than the summary of the metaphysical doctrine taught by the Cabalist doctors. It is, in other words, the system of the Jewish philosophy.
The equally is a political theory, but no a practical politics.
No theory is good unless it permits, not rest, but the greatest work. No theory is good except on condition that one use it to go on beyond.
Dilbert: It took weeks but I've calculated a new theory about the origin of the universe. According to my calculations it didn't start with a "Big Bang" at all-it was more of "Phhbwt" sound. You may be wondering about the practical applications of the "Little Phhbwt" theory. Dogbert: I was wondering when you'll go away.
By the 'mud-sill' theory it is assumed that labor and education are incompatible; and any practical combination of them impossible. According to that theory, a blind horse upon a tread-mill, is a perfect illustration of what a laborer should be -- all the better for being blind, that he could not tread out of place, or kick understandingly. According to that theory, the education of laborers, is not only useless, but pernicious, and dangerous. In fact, it is, in some sort, deemed a misfortune that laborers should have heads at all.
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