GOLDONI, after a rash exertion of writing sixteen plays in a year, confesses he paid the penalty of the folly.  He flew to Genoa, leading a life of delicious vacuity.  To pass the day without doing anything, was all the enjoyment he was now capable of feeling.  But long after he said, “I felt at that time, and have ever since continued to feel, the consequence of that exhaustion of spirits I sustained in composing my sixteen comedies.”

The enthusiasm of study was experienced by POPE in his self-education, and once it clouded over his fine intellect.  It was the severity of his application which distorted his body; and he then partook of a calamity incidental to the family of genius, for he sunk into that state of exhaustion which SMOLLETT experienced during half a year, called a coma vigil, an affection of the brain, where the principle of life is so reduced, that all external objects appear to be passing in a dream.  BOERHAAVE has related of himself, that having imprudently indulged in intense thought on a particular subject, he did not close his eyes for six weeks after; and TISSOT, in his work on the health of men of letters, abounds in similar cases, where a complete stupor has affected the unhappy student for a period of six months.

Assuredly the finest geniuses have not always the power to withdraw themselves from that intensely interesting train of ideas, which we have shown has not been removed from about them by even the violent stimuli of exterior objects; and the scenical illusion which then occurs, has been called the hallucinatio studiosa, or false ideas in reverie.  Such was the state in which PETRARCH found himself, in that minute narrative of a vision in which Laura appeared to him; and TASSO, in the lofty conversations he held with a spirit that glided towards him on the beams of the sun.  In this state was MALEBRANCHE listening to the voice of God within him; and Lord HERBEBT, when, to know whether he should publish his book, he threw himself on his knees, and interrogated the Deity in the stillness of the sky.[A] And thus PASCAL started at times at a fiery gulf opening by his side.  SPINELLO having painted the fall of the rebellious angels, had so strongly imagined the illusion, and more particularly the terrible features of Lucifer, that he was himself struck with such horror as to have been long afflicted with the presence of the demon to which his genius had given birth.  The influence of the game ideal presence operated on the religious painter ANGELONI, who could never represent the sufferings of Jesus without his eyes overflowing with tears.  DESCARTES, when young, and in a country seclusion, his brain exhausted with meditation, and his imagination heated to excess, heard a voice in the air which called him to pursue the search of truth; nor did he doubt the vision, and this delirious dreaming of genius charmed him even in his after-studies.  Our COLLINS and COWPER were often thrown into that extraordinary state of