Pavel Korchagin once showed off a little.
He said, "How should a person spend their life?
"When looking back on the past,
"they should feel no regret for wasted years,
"nor shame for having accomplished nothing;
"that way, when death comes, they can say-
"I devoted my entire life and all my energy to the most precious cause in life.
"-The struggle for humanity's liberation."
In reality, people spent nearly a third of their lives lying on a bed, asleep.
Of the three internationally recognized standards for physical health, quality sleep ranked first.
A balanced diet and appropriate exercise both came after sleep.
A while back, Lin Zhe had only suffered mild insomnia, and for just a few days.
Yet he had often felt sleepy and struggled to concentrate at work during the day.
Long-term insomnia did tremendous harm to a person.
That harm was both physical and psychological.
Long-term insomnia and poor sleep quality did more than affect a person's mood.
They could also impair memory and verbal communication;
impair judgment, and even cause further cognitive problems.
They could even disrupt the immune system's normal functioning.
Over time, this would weaken the body's immunity, making a person physically more susceptible to illness.
Sleeping fewer than six hours a night for a week
would cause changes in more than seven hundred genes in the human body.
These changes affected functions including immunity, metabolism, and psychological abilities.
Sometimes, when you looked in the mirror and noticed you had become less attractive,
it could very well be because you had been chronically short on sleep lately.
Chen Jia had gone from a lively, adorable young girl with a sparkle in her eyes
to a "zombie girl" who looked sickly all day, with a wooden expression and vacant eyes.
Depression was partly to