"If we long for our planet to be important, there is something we can do about it. We make our world significant by the courage of our questions and by the depth of our answers."
"And you are made of a hundred trillion cells. We are, each of us, a multitude."
"We are a way for the cosmos to know itself."
"When we look up at night and view the stars, everything we see is shinning because of distant nuclear fusion."
"If you wish to make an apple pie from scratch, you must first invent the universe."
"The lifetime of a human being is measured by decades, the lifetime of the Sun is a hundred million times longer. Compared to a star, we are like mayflies, fleeting ephemeral creatures who live out their lives in the course of a single day."