1. From his mind. Every book is brewed from the author's own thoughts and is his child. Similar sentences can be found in almost all his works

2. The view of the pessimistic philosopher Schopenhauer. He believed that life is composed of pain, desire is the source of pain, and people must continue to live in peace. Try to satisfy your desires. Desires are never-ending, so getting happiness is just a temporary satisfaction of desires, that is, a temporary cessation of desires. Soon new desires arise, pain comes again, and happiness becomes a thing of the past in a blink of an eye. Pass away. Life is nothing but composed of countless desires and the emptiness after temporary satisfaction of desires.