In The Adolescent, Dostoevsky writes:

"When a person suffers from great sorrow, when he endures immense distress, all he desires is to sleep."

As for Tolstoy, he describes one of the characters in War and Peace:

"He longed to sleep, but he knew he could not, for the darkest thoughts besieged him when he lay in bed."

Anton Chekhov, on the other hand, writes:

"My grandmother always used to say before bedtime: 'My children, never go to sleep feeling depressed, even if life is miserable.'”

And whether a person sleeps or not, the outcome remains the same—at least according to Thomas De Quincey in The Spanish Nun, where he states:

"But sleep does not always restore our vitality as it once did; sometimes, it is like a secret chamber where death prepares its equipment.

Sleep, at times, is that mysterious space where the soul slowly spreads its wings, ready to take flight from the earth."