Conceit is the finest armor that a man can wear. Upon its smooth, impenetrable surface the puny dagger-thrusts of spite and envy glance harmlessly aside. Without that breast-plate the sword of talent cannot force its way through the battle of life, for blows have to be borne as well as dealt.
The stubborn spearmen still made good Their dark impenetrable wood, Each stepping where his comrade stood The instant that he fell.
So many people’s school experience contains at least one instance of being looked down upon because they didn’t care for one or more of the sacred mutant outcroppings of High Modernism, and they concluded from this that Literature is all about impenetrable stuff that they don’t like. That damn Hemingway with his crazy free verse.patrick nielsen hayden
Bereavement is a darkness impenetrable to the imagination of the unbereaved.iris murdoch
If man puts his honor first in relying upon himself, knowing himself and applying himself, this in self-reliance, self-assertion, and freedom, he then strives to rid himself of the ignorance which makes a strange impenetrable object a barrier and a hindrance to his self-knowledge.max stirner
Every human being lived behind an impenetrable wall of choking mist within which no other but he existed. Occasionally there were the dim signals from deep within the cavern in which another man was located so that each might grope toward the other. Yet because they did not know one another, and could not understand one another, and dared not trust one another, and felt from infancy the terrors and insecurity of that ultimate isolation there was the hunted fear of man for man, the savage rapacity of man toward man.Isaac Asimov
Models can easily become so complex that they are impenetrable, unexaminable, and virtually unalterable.donella meadows
But all in all, the fun of children's books is often altruistic: it is a lesson in how to cope with an imperfect and often impenetrable life - and, as we chortle together, a form of intimacy.
The impenetrable stupidity of Prince George (son-in-law of James II.) served his turn. It was his habit, when any news was told him, to exclaim, "Est il possible?" "Is it possible?"
Models can easily become so complex that they are impenetrable, unexaminable, and virtually unalterable.