I would not see our candle blown out in the wind. It is a small thing, this dear gift of life handed us mysteriously out of immensity. I would not have that gift expire… If I seem to be beating a dead horse again and again, I must protest: No! I am beating, again and again, living man to keep him awake and move his limbs and jump his mind… What’s the use of looking at Mars through a telescope, sitting on panels, writing books, if it isn’t to guarantee, not just the survival of mankind, but mankind surviving forever!
- - Ray Bradbury in Mars and the Mind of Man by Carl Sagan, et al, 1971.