A Quote by H. L. Mencken

A professor must have a theory as a dog must have fleas. — © H. L. Mencken
A professor must have a theory as a dog must have fleas.
It is not enough for theory to describe and analyze, it must itself be an event in the universe it describes. In order to do this theory must partake of and become the acceleration of this logic. It must tear itself from all referents and take pride only in the future. Theory must operate on time at the cost of a deliberate distortion of present reality.
So often we think we have got to make a difference and be a big dog. Let us just try to be little fleas biting. Enough fleas biting strategically can make a big dog very uncomfortable.
Great fleas have little fleas upon their backs to bite 'em, And little fleas have lesser fleas, and so ad infinitum, And the great fleas themselves, in turn, have greater fleas to go on, While these again have greater still, and greater still, and so on.
It's a good thing for a dog to have fleas; keeps his mind off being a dog.
A reasonable amount of fleas is good for a dog; it keeps him from brooding over being a dog.
A poet must be a professor of the five senses and must open doors among them.
You must treat the days respectfully, you must be a day yourself, and not interrogate it like a college professor.
What the public does is not to express its opinions but to align itself for or against a proposal. If that theory is accepted, we must abandon the notion that democratic government can be the direct expression of the will of the people. We must abandon the notion that the people govern. Instead, we must adopt the theory that, by their occasional mobilizations as a majority, people support or oppose the individuals who actually govern. We must say that the popular will does not direct continuously but that it intervenes occasionally.
A theory is a good theory if it satisfies two requirements: it must accurately describe a large class of observations on the basis of a model that contains only a few arbitrary elements, and it must make definite predictions about the results of future observations.
Arguing whether or not a God exists is like fleas arguing whether or not the dog exists. Arguing over the correct name for God is like fleas arguing over the name of the dog. And arguing over whose notion of God is correct is like fleas arguing over who owns the dog.
A dog can bite you but you must not bite the dog! Your every movement in life must be peaceful; otherwise you lose your ethical superiority! Nonviolent civil disobedience is a genius; no power can beat it; use it when necessary!
You must not say that this cannot be, or that that is contrary to nature. You do not know what Nature is, or what she can do; and nobody knows; not even Sir Roderick Murchison, or Professor Huxley, or Mr. Darwin, or Professor Faraday, or Mr. Grove, or any other of the great men whom good boys are taught to respect. They are very wise men; and you must listen respectfully to all they say: but even if they should say, which I am sure they never would, 'That cannot exist. That is contrary to nature,' you must wait a little, and see; for perhaps even they may be wrong.
When the little dog snarls, the big dog does not connect the snarl with himself, simply fancying that the little dog must be uncomfortable.
I am a dog that loves my fleas.
When we meet a fact which contradicts a prevailing theory, we must accept the fact and abandon the theory, even when the theory is supported by great names and generally accepted.
It must be conceded that a theory has an important advantage if its basic concepts and fundamental hypotheses are 'close to experience,' and greater confidence in such a theory is certainly justified. There is less danger of going completely astray, particularly since it takes so much less time and effort to disprove such theories by experience. Yet more and more, as the depth of our knowledge increases, we must give up this advantage in our quest for logical simplicity in the foundations of physical theory.
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