An extract from Oliver Sack's 'The River of Consciousness', quoted in a New York Times article today:
"It is often felt that Darwin, more than anyone, banished “meaning” from the world — in the sense of any overall divine meaning or purpose.…. [And yet] evolutionary theory provided, for many of us, a sense of deep meaning and satisfaction that belief in a divine plan had never achieved. The world that presented itself to us became a transparent surface, through which one could see the whole history of life. The idea that it could have worked out differently, that dinosaurs might still be roaming the earth or that human beings might never have evolved, was a dizzying one. It made life seem all the more precious and a wonderful, ongoing adventure."