While we read a novel, we are insaneโbonkers. We believe in the existence of people who aren't there, we hear their voices... Sanity returns (in most cases) when the book is closed.
Ursula K. Le GuinThe Earth is beautiful, and bright, and kindly, but that is not all. The Earth is also terrible, and dark, and cruel. The rabbit shrieks dying in the green meadows. The mountains clench their great hands full of hidden fire. There are sharks in the sea, and there is cruelty in men's eyes.
Ursula K. Le Guin