“the act of vomiting deserves your respect. It's an orchestral event of the gut.”

“To the rocket scientist, you are a problem. You are the most irritating piece of machinery he or she will ever have to deal with. You and your fluctuating metabolism, your puny memory, your frame that comes in a million different configurations. You are unpredictable. You're inconstant. You take weeks to fix. The engineer must worry about the water and oxygen and food you'll need in space, about how much extra fuel it will take to launch your shrimp cocktail and irradiated beef tacos. A solar cell or a thruster nozzle is stable and undemanding. It does not excrete or panic or fall in love with the mission commander. It has no ego. Its structural elements don't start to break down without gravity, and it works just fine without sleep.To me, you are the best thing to happen to rocket science. The human being is the machine that makes the whole endeavor so endlessly intriguing.”

“In the words of the late Francis Crick...You, your joys and your sorrows, your memories and your ambitions, your sense of personal identity and free will, are in fact no more than the behavior of a vast assembly of nerve cells and their associated molecules. (13)”

“Every mode of travel has its signature mental aberration.”

“Religion says that your soul goes to heaven or possibly to a seven-tiered garden, or that your soul is reincarnated into a new body, or that you lie around in your coffin clothes until the Second Coming. And, of course, only one of these can be true. Which means that for millions of people, religion will turn out to have been a bum steer as regards the hereafter. (13)”

“The point is that no matter what you choose to do with your body when you die, it won't, ultimately, be very appealing. If you are inclined to donate yourself to science, you should not let images of dissection or dismemberment put you off. They are no more or less gruesome, in my opinion, than ordinary decay or the sewing shut of your jaws via your nostrils for a funeral viewing.”

“You are a person and then you cease to be a person, and a cadaver takes your place.”