You may not feel outstandingly robust, but if you are an average-sized adult you will contain within your modest frame no less than 7 X 10^18 joules of potential energy — enough to explode with the force of thirty very large hydrogen bombs, assuming you knew how to liberate it and really wished to make a point. Everything has this kind of energy trapped within it. We're just not very good at getting it out. Even a uranium bomb — the most energetic thing we have produced yet — releases less than 1 percent of the energy it could release if only we were more cunning.

It’s all about the energy of exchange.

Until the energy body is complete and mature, it is self-absorbed. It can't get free from the compulsion to be absorbed by everything.

It’s unavoidable: so long as we value money more highly than living beings and more highly than relationships, we will continue to see living beings as resources, and convert them to cash; objectifying, killing, extirpating. This is true whether we’re talking about fish, fur-bearing mammals, Indians, day-laborers, and so on. If monetary value is attached to something it will be exploited until it’s gone.

What then is that precious something contained in our food which keeps us from death? That is easily answered. Every process, event, happening – call it what you will; in a word, everything that is going on in Nature means an increase of the entropy of the part of the world where it is going on. Thus a living organism continually increases its entropy – or, as you may say, produces positive entropy – and thus tends to approach the dangerous state of maximum entropy, which is death. It can only keep aloof from it, i.e. alive, by continually drawing from its environment negative entropy – which is something very positive as we shall immediately see. What an organism feeds upon is negative entropy. Or, to put it less paradoxically, the essential thing in metabolism is that the organism succeeds in freeing itself from all the entropy it cannot help producing while alive.

You may not feel outstandingly robust, but if you are an average-sized adult you will contain within your modest frame no less than 7 X 10^18 joules of potential energy — enough to explode with the force of thirty very large hydrogen bombs, assuming you knew how to liberate it and really wished to make a point.

Life is less a miracle than a necessity for matter and energy

What an organism feeds upon is negative entropy. Or, to put it less paradoxically, the essential thing in metabolism is that the organism succeeds in freeing itself from all the entropy it cannot help producing while alive.

But when other people criticise our own more exalted soul-flights by calling them “nothing but” expressions of our organic disposition, we feel outraged and hurt, for we know that, whatever be our organism's peculiarities, our mental states have their substantive value as revelations of the living truth; and we wish that all this medical materialism could be made to hold its tongue.

The trade is meaningless. It is like trading a used mattress for a $300 bill.

In the past we have tried to make a distinction between animals which we acknowledge have some value and other which, having none, can be liquidated when we wish. This standard must be abandoned. Everything that lives has value simply as a living thing, as one of the manifestations of the mystery that is life.

Exchange is the lifeblood, not only of our economy, but of civilization itself.

How does the living organism avoid decay? The obvious answer is: By eating, drinking, breathing and (in the case of plants) assimilating. The technical term is metabolism. The Greek word () means change or exchange. Exchange of what? Originally the underlying idea is, no doubt, exchange of material. (E.g. the German for metabolism is Stoffwechsel.) That the exchange of material should be the essential thing is absurd. Any atom of nitrogen, oxygen, sulphur, etc., is as good as any other of its kind; what could be gained by exchanging them? For a while in the past our curiosity was silenced by being told that we feed upon energy.

Energy cannot be created or destroyed, it can only be changed from one form to another.