These men may, indeed, well be expected to pay particular homage to night; since they are indebted to her, not only for cessation of pain, but increase of pleasure; not only for slumber, but for knowledge.  But the greater part of her avowed votaries are the sons of luxury; who appropriate to festivity the hours designed for rest; who consider the reign of pleasure as commencing when day begins to withdraw her busy multitudes, and ceases to dissipate attention by intrusive and unwelcome variety; who begin to awake to joy when the rest of the world sinks into insensibility; and revel in the soft affluence of flattering and artificial lights, which “more shadowy set off the face of things.”

Without touching upon the fatal consequences of a custom, which, as Ramazzini observes, will be for ever condemned, and for ever retained; it may be observed, that however sleep may be put off from time to time, yet the demand is of so importunate a nature, as not to remain long unsatisfied:  and if, as some have done, we consider it as the tax of life, we cannot but observe it as a tax that must be paid, unless we could cease to be men; for Alexander declared, that nothing convinced him that he was not a divinity, but his not being able to live without sleep.

To live without sleep in our present fluctuating state, however desirable it might seem to the lady in Clelia, can surely be the wish only of the young or the ignorant; to every one else, a perpetual vigil will appear to be a state of wretchedness, second only to that of the miserable beings, whom Swift has in his travels so elegantly described, as “supremely cursed with immortality.”

Sleep is necessary to the happy to prevent satiety, and to endear life by a short absence; and to the miserable, to relieve them by intervals of quiet.  Life is to most, such as could not be endured without frequent intermission of existence:  Homer, therefore, has thought it an office worthy of the goddess of wisdom, to lay Ulysses asleep when landed on Phaeacia.

It is related of Barretier, whose early advances in literature scarce any human mind has equalled, that he spent twelve hours of the four-and-twenty in sleep:  yet this appears from the bad state of his health, and the shortness of his life, to have been too small a respite for a mind so vigorously and intensely employed:  it is to be regretted, therefore, that he did not exercise his mind less, and his body more:  since by this means, it is highly probable, that though he would not then have astonished with the blaze of a comet, he would yet have shone with the permanent radiance of a fixed star.

Nor should it be objected, that there have been many men who daily spend fifteen or sixteen hours in study:  for by some of whom this is reported it has never been done; others have done it for a short time only; and of the rest it appears, that they employed their minds in such operations as required neither celerity nor strength, in the low drudgery of collating copies, comparing authorities, digesting dictionaries, or accumulating compilations.