A living language is like a man suffering incessantly from small hemorrhages, and what it needs above all else is constant transactions of new blood from other tongues. The day the gates go up, that day it begins to die.
Interpretation
A language requires constant interaction with other languages to thrive; without it, it stagnates and dies.
H. L. Mencken's quote suggests that a living language is dynamic and must continually evolve through contact with other languages. Just as a person suffering from blood loss needs a transfusion to survive, a language needs new words and influences from different tongues to remain vibrant and relevant. When a language becomes isolated or ceases to absorb new elements, it begins to decline.
In practice
This quote can be used in a speech about the importance of multiculturalism in language learning.
I know a good many men of great learning-that is, men born with an extraordinary eagerness and capacity to acquire knowledge. One and all, they tell me that they can't recall learning anything of any value in school. All that schoolmasters managed to accomplish with them was to test and determine the amount of knowledge that they had already acquired independently-and not infrequently the determination was made clumsily and inaccurately.
It takes a long while for a naturally trustful person to reconcile himself to the idea that after all God will not help him
It is the theory of all modern civilized governments that they protect and foster the liberty of the citizen; it is the practice of all of them to limit its exercise, and sometimes very narrowly.
The central belief of every moron is that he is the victim of a mysterious conspiracy against his common rights and true deserts.
The cure for the evils of democracy is more democracy.
It is my conviction that no normal man ever fell in love, within the ordinary meaning of the term, after the age of thirty.
Dangling punch lines to forgotten stories remain in the language like the smile of the Cheshire cat.
People are under the impression that dictionaries legislate language. What a dictionary does is keep track of usages over time.
Those who sniff decay in every shift of sense or alteration of usage do the language no service. Too often for such people the notion of good English has less to do with expressing ideas clearly than with making words conform to some arbitrary pattern.
A standard international language should not only be simple, regular, and logical, but also rich and creative.
Look at almost any passage, and you'll find that a paragraph has five or six metaphors in it. It's not that the speaker is trying to be poetic, it's just that that's the way language works.
I have every reason to believe that an individual man or woman fluent in several tongues seduces, possesses, remembers differently according to his or her use of the relevant language.
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