“Human beings cannot live without challenge. We cannot live without meaning. Everything ever achieved we owe to this inexplicable urge to reach beyond our grasp, do the impossible, know the unknown. The Upanishads would say this urge is part of our evolutionary heritage, given to us for the ultimate adventure: to discover for certain who we are, what the universe is, and what is the significance of the brief drama of life and death we play out against the backdrop of eternity.”