Eventually we must leave Earth-at least a certain number of our progeny must as our sun approaches the end of its solar life cycle. But just as terrestrial explorers have always led the way for settlers, this will also happen extraterrestrially. Earth is our cradle, not our final destiny.
Edgar Mitchell (2009). “The Way of the Explorer: An Apollo Astronaut's Journey Through the Material and Mystical Worlds: Easyread Large Bold Edition”, p.415, ReadHowYouWant.com
