If any one of about 40 physical qualities had more than slightly different values, life as we know it could not exist.
Stephen HawkingI have lived with the prospect of an early death for the last 49 years. I'm not afraid of death, but I'm in no hurry to die. I have so much I want to do first. I regard the brain as a computer which will stop working when its components fail. There is no heaven or afterlife for broken down computers; that is a fairy story for people afraid of the dark.
Stephen Hawking