Tome

“Nine out of ten humans killed? And you're not bothered."
A look of mysterious thoughtfulness crossed his face. "A virus can be useful to a species by thinning it out," he said.
A scream cut the air. It sounded nonhuman.
He took his eyes off the water and looked around. "Hear that pheasant? That's what I like about the Bighorn River," he said.
"Do you find viruses beautiful?"
"Oh, yeah," he said softly. "Isn't it true that if you stare into the eyes of a cobra, the fear has another side to it? The fear is lessened as you begin to see the essence of the beauty. Looking at Ebola under an electron microscope is like looking at a gorgeously wrought ice castle. The thing is so cold. So totally pure." He laid a perfect cast on the water, and eddies took the fly down. (92)”
― Richard Preston, The Hot Zone: The Terrifying True Story of the Origins of the Ebola Virus