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Duality   /duˈæləti/   Listen
Duality

noun
1.
Being twofold; a classification into two opposed parts or subclasses.  Synonym: dichotomy.
2.
(physics) the property of matter and electromagnetic radiation that is characterized by the fact that some properties can be explained best by wave theory and others by particle theory.  Synonym: wave-particle duality.
3.
(geometry) the interchangeability of the roles of points and planes in the theorems of projective geometry.






WordNet 3.0 © 2010 Princeton University








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"Duality" Quotes from Famous Books



... his volition, fought for the destruction of slavery. Just as soon as this second truth came up and took distinct shape beside the other, angry political divisions sundered the Unionists. Abolition of slavery never displaced Union as a purpose of the war; but the two became mingled, in a duality which could not afterward be resolved into its component parts so that one could be taken and the other could be left. The union of the two issues meant the disunion of the people of the Middle and even of ...
— Abraham Lincoln, Vol. II • John T. Morse

... made, duties to perform, evil to be faced. The bodily temptations are absent, but there is still that which lay behind the bodily frailties—curiosity, love of sensation, excitement, desire; the strong duality of nature—the knowledge of duty on the one hand and the indolent shrinking from performance—that is all there; there is the same sense of isolation, and the same need for patient endeavour as upon earth. All that ...
— The Child of the Dawn • Arthur Christopher Benson

... teaching does not imply a real duality—THE ALL is ONE—the Two Aspects are merely aspects of manifestation. The teaching is that The Masculine Principle manifested by THE ALL stands, in a way, apart from the actual mental creation of the Universe. ...
— The Kybalion - A Study of The Hermetic Philosophy of Ancient Egypt and Greece • Three Initiates

... is it altogether peculiar to it. So far as I am aware no person was ever born married, and in extreme youth bachelors and spinsters are so common as to call for no remark. Nature strives, not for duality as in the case of the Siamese Twins but for individuality. We are all born strongly separated, and I am often inclined to fancy that this ceremony of joining appears very like flying in the face of Providence. I have also thought, on ...
— Here are Ladies • James Stephens

... the highest class), and the emotional part of us. If the scope and capacity of the art, and the evolutionary processes which its history discloses (a record of which is preserved in its nomenclature), are to be understood, it is essential that this duality be kept in view. There is something so potent and elemental in the appeal which music makes that it is possible to derive pleasure from even an unwilling hearing or a hearing unaccompanied by effort at analysis; but real appreciation of its beauty, which ...
— How to Listen to Music, 7th ed. - Hints and Suggestions to Untaught Lovers of the Art • Henry Edward Krehbiel

... by evidence was that in animals the process of development is carried on, not by differentiations only, but by subordinate integrations. Now in the social organism we may see the same duality of process; and further, it is to be observed that the integrations are of the same three kinds. Thus we have integrations which arise from the simple growth of adjacent parts that perform like functions: as, for instance, the coalescence of Manchester with its ...
— Essays: Scientific, Political, & Speculative, Vol. I • Herbert Spencer

... into insignificance and nullity compared with this: this present, they disappear: this absent, each alone is sufficient to wreck the soul, fluttering about without rudder or ballast on the waves of the world. Duality is the root, out of which alone, for mortals, happiness can spring. And the old Hindoo mythology, which is far deeper in its simplicity than the later idealistic pessimism, expresses this beautifully by giving to every god his other half; the ...
— The Substance of a Dream • F. W. Bain

... intimately personal things in the very act of carrying on an impersonal triangular conversation; as if there were two of him present, one being occupied in the approved teacup manner while the other sat by speculating with a touch of moroseness upon distressingly important potentialities. This duality persisted in functioning even when Betty looked at her watch ...
— Poor Man's Rock • Bertrand W. Sinclair

... attributes of God, one of the perfections which we contemplate in our idea of him, that there is no duality or opposition between his will and his vision, between the impulses of his nature and the events of his life. This is what we commonly designate as omnipotence and creation. Now, in the contemplation of beauty, our faculties of perception have the same perfection: it is ...
— The Sense of Beauty - Being the Outlines of Aesthetic Theory • George Santayana

... well know, so far from involving Dualism, is based on the One, which becomes Two on manifestation, just as Atheism posits one existence, only cognisable in the duality force and matter, and as philosophic—though not popular—Theism teaches one Deity whereof are spirit and matter. Mr. Bradlaugh's temperate disapproval was not copied in its temperance by some other Freethought ...
— Annie Besant - An Autobiography • Annie Besant

... always deliriously wandering. All the while he thus lay dying, the mulatto woman, with whom he lived in this part of his extraordinary dual existence, nursed and cared for him with such rude attentions as the surroundings afforded. In the wanderings of his mind the same duality of life followed him. Now and then he would appear the calm, sober, self-contained, well-ordered member of a peaceful society that his friends in his far-away home knew him to be; at other times the nether part of his nature would leap up into life like a wild beast, furious and gnashing. At the ...
— Howard Pyle's Book of Pirates • Howard I. Pyle

... were rare. They experienced that physical and mental unity in duality which comes to people who live and think and work together for a common aim. They had not separated a day since that first visit to Boston. The summer had been spent at a cheap boarding-house on Cape Ann, in order ...
— Literary Love-Letters and Other Stories • Robert Herrick

... suggestion of an absolute duality between his lower and higher moods, and the poetic work produced in them, stimulating the reader to look below the immediate surface of his poetry, makes the study of Wordsworth an excellent exercise for the training ...
— Essays from 'The Guardian' • Walter Horatio Pater

... this journey of mine was performed were most painful. Still, through that remarkable power of the human mind, which seems to act independently of volition, that mysterious duality of being which observes, discriminates, and remembers, while at the same time preoccupied by an overwhelming grief, I was enabled to note each little incident with ...
— The Continental Monthly, Vol. 4, No. 2, August, 1863 - Devoted to Literature and National Policy • Various

... this. "But that is only one side of it, is it not?" she asked after a moment's reflection. "I notice in all things a curious duality, a right side and a wrong side. Confusion is the wrong side of order, misery of happiness, falsehood of truth, evil of good; and it seems to me that novel-reading, which can be a vice, I know, may also be made a virtue. It depends on ...
— The Beth Book - Being a Study of the Life of Elizabeth Caldwell Maclure, a Woman of Genius • Sarah Grand

... essay on "The Origin and Functions of Music," speaks of speech as the parent of music. He says, "utterance, which when languaged is speech, gave rise to music." The definition is incomplete, for "languaged utterance," as he calls it, which is speech, is a duality, is either an expression of emotion or a mere symbol of emotion, and as such has gradually sunk to the level of the commonplace. As Rowbotham points out, impassioned speech is the parent of music, while unimpassioned speech has remained the vehicle for the smaller emotions of life, the everyday ...
— Critical & Historical Essays - Lectures delivered at Columbia University • Edward MacDowell

... duality in man. Of the inner person, behind the outward current of thoughts, feelings and events, but little is known or recked; but for all that, he cannot be got rid of as a factor in life's progress. When the outward life fails to harmonise with the inner, the dweller within is hurt, and his pain manifests ...
— My Reminiscences • Rabindranath Tagore

... when Belgium is represented as the "kernel of Europe," as combining the spirit of the North, East and South. It is not enough to say that the country seems predestined to this task by her geographical position and her duality of race and language bringing together the so-called "Germanic" and "Latin" tendencies; it must be added that, whenever historical circumstances allowed it, the people made full use of such advantages. ...
— Belgium - From the Roman Invasion to the Present Day • Emile Cammaerts

... qualities of pradhana (the active or spiritual cause of the world) in various proportions produces the mundane order of things. Thus is proved the eternity of prakriti or nature and is also established the doctrine of duality. ...
— The Mahabharata of Krishna-Dwaipayana Vyasa, Volume 1 • Kisari Mohan Ganguli

... an animal function, one admits, one insists; it may be only that. But also in the bewildering and humorous and tragic duality of all life's energies, it is the bridge to every eternity which is not merely a spectral condition of earth disembowelled of its lusts. For sex holds the substance of the image. But we must remember with Heine that Aristophanes is the God of this ironic earth, ...
— Lysistrata • Aristophanes

... all-pervading ether which is the physical basis of the universe, may we not add the suprasumption** of an all-pervading soul which is the spiritual basis of not only the ether but of life itself? The seeming duality of mind and matter, of the soul and body, must terminate somewhere, must merge in identity. Whether that identity be the Creator of theology or the soul of speculation does not much matter, since the final result is the same, namely, the immortality ...
— Two Thousand Miles On An Automobile • Arthur Jerome Eddy

... chandeliers the passengers are drawing together in groups, and coteries; some to converse, others to play ecarte or vingt-un; here and there a solitary individual burying himself in a book; or a pair, almost as unsocial, engaging in the selfish duality of chess. ...
— The Death Shot - A Story Retold • Mayne Reid

... Atomic, and the Vedanta. The Dialectic school considers the principles of knowledge as entirely distinct from nature; it admits the existence of universal ideas in the human mind; it establishes the syllogistic form as the complete method of reasoning, and finally, it holds as fundamental the duality of intelligence and nature. In this theory, the soul is considered as distinct from Brahm and also from the body. Man can approach Brahm, can unite himself to the universal soul, but can never lose his ...
— Handbook of Universal Literature - From The Best and Latest Authorities • Anne C. Lynch Botta

... there is here, so far as we can discover, only a duality of principle, viz: the material body and a modified phase of electro-vitality. These component parts appear to sustain to each other, in the vegetable, relations quite analogous to those of the corresponding parts in the animal. But here the mental part is wanting; ...
— A Newly Discovered System of Electrical Medication • Daniel Clark

... themselves two natures, the poet ever dreaming on the lofty summits where the choir of inspired voices are warbling, and the man, worker-out of his life, able to knead his daily bread, but this duality which almost always exists among strongly tempered natures, of whom it is one of the distinctive characteristics, is not met with amongst the greater number of these young fellows, whom pride, a bastard pride, has rendered invulnerable to all ...
— Bohemians of the Latin Quarter • Henry Murger

... rival systems of labor culminated in the war to save the old Union on the part of the North and to establish a new one on the part of the South, whose Constitution rested directly upon the doctrine of social unity. Social duality was the great fact in the Constitution of the old Union; social uniformity was to be the great fact in the new. A State divided socially against itself cannot stand. The South learned this supreme lesson in political ...
— Modern Industrialism and the Negroes of the United States - The American Negro Academy, Occasional Papers No. 12 • Archibald H. Grimke

... before dawn, half dark and half bright. In this light it may well be said of them that one alone is the son of bright Dyaus, that both wed Dawn, or are her brothers. They always come together. Their duality represents, then, not successive stages but one stage in day's approach, when light is dark and dark is light. In comparing the Acvins to other pairs[111] this dual nature is frequently referred to; ...
— The Religions of India - Handbooks On The History Of Religions, Volume 1, Edited By Morris Jastrow • Edward Washburn Hopkins

... is admitted that in real life it is not well for One to be alone, and I think pure unity is no less barren and graceless in metaphysics. You must have plurality to start with, or trinity, or at least duality, if you wish to get anywhere, even if you wish to get effectively into the bosom of the One, abandoning your separate existence. Freud, like Empedocles, has prudently introduced a prior principle for Love to play with; not Strife, however (which is only an incident in ...
— Some Turns of Thought in Modern Philosophy - Five Essays • George Santayana

... and his people about him, saying, that he was the happiest man in the world for doing of great things by sorry instruments. And so particularized in Sir W. Clerke, and Riggs, and Halsey, and others. And then again said that the only duality eminent in him was, that he did persevere; and indeed he is a very drudge, and ...
— The Diary of Samuel Pepys • Samuel Pepys

... now acquired a happy smattering of various information, she used it with good effect—she passed for a singularly well informed woman in Washington. The quality of her literary tastes had necessarily undergone constant improvement under this regimen, and as necessarily, also; the duality of her language had improved, though it cannot be denied that now and then her former condition of life betrayed itself in just perceptible inelegancies of expression ...
— The Gilded Age, Part 4. • Mark Twain (Samuel Clemens) and Charles Dudley Warner

... and women. His mankind is delightful. It is delightful in its tenacity; it refuses to own itself beaten; it will sleep on the battlefield. These warlike images come by themselves under the pen; since from the duality of man's nature and the competition of individuals, the life-history of the earth must in the last instance be a history of a really very relentless warfare. Neither his fellows, nor his gods, nor his passions will leave ...
— Notes on Life and Letters • Joseph Conrad

... the observations made by Bichat on the duality of our external senses, I was really bewildered by my recollections, recognizing the startling coincidences between the views of that celebrated physiologist and those of Louis Lambert. They both died young, and they had ...
— Louis Lambert • Honore de Balzac

... to Goethe. Perhaps the great poet was himself led to it by his Rosicrucian studies when writing the first part of Faust. Howes tells his friend that "there is all good to be found in unity, & all evil in duality & multiplicity. Phoenix illa admiranda sola semper existit, therefore while a man & she is two, he shall never see her,"—a truth of very wide application, and too often lost sight of or never seen at ...
— Among My Books - First Series • James Russell Lowell

... kept its eyes open to this obvious duality of goodness it has often incurred the contempt of practical men. The ethical writers of our time have done better. They have come to see that the goodness of a person or thing consists in its being as richly diversified as is possible up to the limit of harmonious, working, ...
— The Nature of Goodness • George Herbert Palmer

... best endeavour to exhibit the great model on its terrestrial side, in its contact with the world. Here is the true source of that new and noble cycle which the middle ages have handed down to us in duality of form, but with a nearly identical substance, under the royal sceptres of Arthur in England and of ...
— Famous Reviews • Editor: R. Brimley Johnson

... it is one of my decided opinions that married people ought to have no one, be the tie ever so close and dear, living permanently with them, to break the sacred duality—no, let me say the unity of ...
— John Halifax, Gentleman • Dinah Maria Mulock Craik



Words linked to "Duality" :   exchangeability, fungibility, categorization, geometry, property, wave-particle duality, physics, dichotomy, dual, interchangeability, categorisation, classification, interchangeableness, natural philosophy



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