As I thought about this, I noted that the bacterium is just a physical system; it's just a bunch of molecules that hang together and do things to one another. So, I wondered, what characteristics are necessary for a physical system to be an autonomous agent? After thinking about this for a number of months I came up with a tentative definition. My definition is that an autonomous agent is something that can both reproduce itself and do at least one thermodynamic work cycle. It turns out that this is true of all free-living cells, excepting weird special cases. They all do work cycles, just like the bacterium spinning its flagellum as it swims up the glucose gradient. The cells in your body are busy doing work cycles all the time.
Stuart KauffmanRelated topics
agent body busy came cycle definition hang necessary number something tentative thought thinking weird work things monthsRelated quotes
Identical in the physical processes by which he originates-identical in the early stages of his formation-identical in the mode of his nutrition before and after birth, with the animals which lie immediately below him in the scale-Man, if his adult and perfect structure be compared with theirs, exhibits, as might be expected, a marvellous likeness of organization. He resembles them as they resemble one another-he differs from them as they differ from one another.-And, though these differences and resemblances cannot be weighed and measured, their value may be readily estimated; the scale or standard of judgment, touching that value, being afforded and expressed by the system of classification of animals now current among zoologists.
Thomas Henry Huxley
My Drawings expressed my despair, hate and disillusionment, I drew drunkards; puking men; men with clenched fists cursing at the moon ... I drew a man, face filled with fright, washing blood from his hands ... I drew lonely little men fleeing madly through empty streets. I drew a cross-section of tenement house: through one window could be seen a man attacking his wife; through another, two people making love; from a third hung a suicide with body covered by swarming flies. I drew soldiers without noses; war cripples with crustacean-like steel arms; two medical soldiers putting a violent infantryman into a strait-jacket made of a horse blanket ... I drew a skeleton dressed as a recruit being examined for military duty. I also wrote poetry.
George Grosz
By following entirely the guidance of lust, in the manner of fools, man loses his intellectual energy, injures his body, and perishes before his natural time; sighs and cares multiply; there is an increase of envy, hatred, and warfare, for the purpose of taking what another possesses. The cause of all this is the circumstance that the ignorant considers physical enjoyment as an object to be sought for its own sake. God in His wisdom has therefore given us such commandments as would counteract that object, and prevent us altogether from directing our attention to it, and has debarred us from everything that leads only to excessive desire and to lust. This is an important thing included in the objects of our Law.
Maimonides
If there was anything, anything more at all, after this crazy mix-up we call living, I could feel that there might be some point to the whole frantic business, even if I did not know and could not know the full answer while I was alive.”
"And suppose there was not? Suppose that when a man's body disintegrates, he himself disappears absolutely. I'm bound to say I find it a probable hypothesis.”
"Well- It wouldn't be cheerful knowledge, but it would be better than not knowing. You could plan your life rationally, at least. A man might even be able to get a certain amount of satisfaction in planning things better for the future, after he's gone. A vicarious pleasure in the anticipation.
Robert A. Heinlein
It is one of the most beautiful characteristics of Theosophy that it gives back to people in a more rational form everything which was really useful and helpful to them in the religions which they have outgrown... in this teaching as to the immortality of the soul and the life after death, Theosophy...does not put forward these great truths merely on the authority of some sacred book of long ago; in speaking of these subjects it is not dealing with pious opinions, or metaphysical speculations, but with solid, definite facts, as real and as close to us as the air we breathe or the houses we live in - facts of which many among us have constant experience - facts among which lies the daily work of some of our students, as will presently be seen.
Charles Webster Leadbeater