Here's the thing about Hazel: Almost everyone is obsessed with leaving a mark upon the world. Bequeathing a legacy. Outlasting death. We all want to be remembered. I do, too. That's what bothers me most, is being another unremembered casualty in the ancient and inglorious war against disease.I want to leave a mark.But Van Houten: The marks humans leave are too often scars. You build a hideous minimall or start a coup or try to become a rock star and you think, "They'll remember me now," but (a) they don't remember you, and (b) all you leave behind are more scars. Your coup becomes a dictatorship. Your minimall becomes a lesion....We are like a bunch of dogs squirting on fire hydrants. We poison the groundwater with our toxic piss, marking everything MINE in a ridiculous attempt to survive our deaths. I can't stop pissing on fire hydrants. I know it's silly and useless--epically useless in my current state--but I am an animal like any other.Hazel is different. She walks lightly, old man. She walks lightly upon the earth. Hazel knows the truth: We're as likely to hurt the universe as we are to help it, and we're not likely to do either.People will say it's sad that she leaves a lesser scar, that fewer remember her, that she was loved deeply but not widely. But it's not sad, Van Houten. It's triumphant. It's heroic. Isn't that the real heroism? Like the doctors say: First, do no harm.The real heroes anyway aren't the people doing things; the real heroes are the people NOTICING things, paying attention. The guy who invented the smallpox vaccine didn't actually invent anything. He just noticed that people with cowpox didn't get smallpox....But then I wanted more time so we could fall in love. I got my wish, I suppose. I left my scar....What else? She is so beautiful. You don't get tired of looking at her. You never worry if she is smarter than you: You know she is. She is funny without ever being mean. I love her. I am so lucky to love her, Van Houten. You don't get to choose if you get hurt in this world, old man, but you do have some say in who hurts you. I like my choices. I hope she likes hers.
If we analyse the classes of life, we readily find that there are three cardinal classes which are radically distinct in function. A short analysis will disclose to us that, though minerals have various activities, they are not "living." The plants have a very definite and well known function-the transformation of solar energy into organic chemical energy. They are a class of life which appropriates one kind of energy, converts it into another kind and stores it up; in that sense they are a kind of storage battery for the solar energy; and so I define THE PLANTS AS THE CHEMISTRY-BINDING class of life.The animals use the highly dynamic products of the chemistry-binding class-the plants-as food, and those products-the results of plant-transformation-undergo in animals a further transformation into yet higher forms; and the animals are correspondingly a more dynamic class of life; their energy is kinetic; they have a remarkable freedom and power which the plants do not possess-I mean the freedom and faculty to move about in space; and so I define ANIMALS AS THE SPACE-BINDING CLASS OF LIFE.And now what shall we say of human beings? What is to be our definition of Man? Like the animals, human beings do indeed possess the space-binding capacity but, over and above that, human beings possess a most remarkable capacity which is entirely peculiar to them-I mean the capacity to summarise, digest and appropriate the labors and experiences of the past; I mean the capacity to use the fruits of past labors and experiences as intellectual or spiritual capital for developments in the present; I mean the capacity to employ as instruments of increasing power the accumulated achievements of the all-precious lives of the past generations spent in trial and error, trial and success; I mean the capacity of human beings to conduct their lives in the ever increasing light of inherited wisdom; I mean the capacity in virtue of which man is at once the heritor of the by-gone ages and the trustee of posterity. And because humanity is just this magnificent natural agency by which the past lives in the present and the present for the future, I define HUMANITY, in the universal tongue of mathematics and mechanics, to be the TIME-BINDING CLASS OF LIFE.