Each one of you is so amazing. Right now you have in you one quadrillion cells. That's one hundred trillion times one thousand. About nine hundred trillion of those cells are not human. They're virus, bacteria, and microorganisms. What makes us human, ironically, is not human. If they were not there you would rot like a piece of fruit in a few days. So be grateful for those free riders. But I want you to experience something, because every second in your body, one septillion things are happening. That's a one with 24 zeros. Another way to imagine one septillion is it's ten times more than all the stars and planets in the known universe. Now, let me ask you a question: Can you feel it? Seriously. One septillion interactions. It's called life. You can feel it. Except we talk and we get busy and we ignore that feeling."
-- Paul Hawken