Illusion

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ILLUSION. A species of mania in which the sensibility of the nervous system is altered, excited, weakened or perverted. The patient is deceived by the false appearance of things, and his reason is not sufficiently active and powerful to correct the error, and this last particular is what distinguishes the sane from the insane. Illusions are not unfrequent in a state of health, but reason corrects the errors and dissipates them. A square tower seen from a distance may appear round, but on approaching it, the error is corrected. A distant mountain may be taken for a cloud, but as we approach, we discover the truth. To a person in the cabin of a vessel under sail, the shore appears to move; but reflection and a closer examination soon destroy this illusion. An insane individual is mistaken on the qualities, connexions, and causes of the impressions he actually receives, and he forms wrong judgments as to his internal and external sensations; and his reason does not correct the error. 1 Beck's Med. Jur. 538; Esquirol, Maladies Mentales, prem. partie, III., tome 1, p. 202. Dict. des Sciences Medicales, Hallucination, tome 20, p. 64. See Hallucination.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.
References in classic literature ?
Yes, some wretch, whose feet were not bare like those of the victims of the rosy hours of Mazenderan, had certainly fallen into this "mortal illusion" and, mad with rage, had kicked against those mirrors which, nevertheless, continued to reflect his agony.
An illusion that won't convince is a palpable lie, and that's what grand opera is to me when little Barillo throws a fit, clutches mighty Tetralani in his arms (also in a fit), and tells her how passionately he adores her."
And next day Martin Eden cast hack-work aside, and at white heat hammered out an essay to which he gave the title, "The Philosophy of Illusion." A stamp started it on its travels, but it was destined to receive many stamps and to be started on many travels in the months that followed.
Her remark was entirely destructive of poetry, since it was to the effect that poetry had nothing whatever to do with her; all her friends spent their lives in making up phrases, she said; all his feeling was an illusion, and next moment, as if to taunt him with his impotence, she had sunk into one of those dreamy states which took no account whatever of his existence.
If this golden rim were quenched, if life were no longer circled by an illusion (but was it an illusion after all?), then it would be too dismal an affair to carry to an end; so he wrote with a sudden spurt of conviction which made clear way for a space and left at least one sentence standing whole.
From the cigar nestled in the brickwork to 'The Dress', many optical illusions have left viewers around the world baffled over the years.
In "Dangerous Illusions: How Religion Deprives Us of Happiness" Malkin deftly argues for a radical shift in humanity's thinking about religion--namely, that reason and religion cannot co-exist, and that mankind will only be truly happy if we are able to shake off the illusions of religion in order to live a life more rooted in the present.
The gallery is a perfect way to spend a rainy day in Liptov.default:svg width="23" height="23default:use xlink:efault:useefault:svdefault:svg width="22" height="22default:use xlink:efault:useefault:svIlusia, the gallery of illusions has opened in the centre of Liptovskyacute Mikulaacutescaron.
The Museum of Illusions is the world's fastest growing museum chain in the world, and the new Dubai museum is the largest one yet -- housing 80 exhibits and interactive attractions designed to blow your mind.
Summary: TEHRAN (FNA)- By making a neural-network computer model that can be fooled by optical illusions like humans, the researchers advanced knowledge of the human visual system and may help improve artificial vision.
Summary: Museum of Illusions opens in Dubai in Al Seef featuring 80 interactive exhibits designed to play tricks on the brain