Monday, August 15, 2011

Monday Morning Quotes: Richard Feynman

“You can't say A is made of B or vice versa. All mass is interaction.”

“I have approximate answers and possible beliefs in different degrees of certainty about different things, but I'm not absolutely sure of anything, and of many things I don't know anything about, but I don't have to know an answer I don't feel frightened by not knowing things, by being lost in the mysterious universe without having any purpose which is the way it really is as far as I can tell possibly. It doesn't frighten me.”

“It doesn't seem to me that this fantastically marvelous universe, this tremendous range of time and space and different kinds of animals, and all the different planets, and all these atoms with all their motions, and so on, all this complicated thing can merely be a stage so that God can watch human beings struggle for good and evil — which is the view that religion has. The stage is too big for the drama.”

“God was invented to explain mystery. God is always invented to explain those things that you do not understand. Now, when you finally discover how something works, you get some laws which you're taking away from God; you don't need him anymore. But you need him for the other mysteries. So therefore you leave him to create the universe because we haven't figured that out yet; you need him for understanding those things which you don't believe the laws will explain, such as consciousness, or why you only live to a certain length of time — life and death — stuff like that. God is always associated with those things that you do not understand. Therefore I don't think that the laws can be considered to be like God because they have been figured out.”

“If an apple was magnified to the size of the Earth, then the atoms in the apple would be approximately the size of the original apple.”

“We've learned from experience that the truth will come out. Other experimenters will repeat your experiment and find out whether you were wrong or right. Nature's phenomena will agree or they'll disagree with your theory. And, although you may gain some temporary fame and excitement, you will not gain a good reputation as a scientist if you haven't tried to be very careful in this kind of work.”

“Some years ago I had a conversation with a layman about flying saucers — because I am scientific I know all about flying saucers! I said ‘I don't think there are flying saucers'. So my antagonist said, ‘Is it impossible that there are flying saucers? Can you prove that it's impossible?’ ‘No’, I said, ‘I can't prove it's impossible. It's just very unlikely’. At that he said, ‘You are very unscientific. If you can't prove it impossible then how can you say that it's unlikely?’ But that is the way that is scientific. It is scientific only to say what is more likely and what less likely, and not to be proving all the time the possible and impossible. To define what I mean, I might have said to him, ‘Listen, I mean that from my knowledge of the world that I see around me, I think that it is much more likely that the reports of flying saucers are the results of the known irrational characteristics of terrestrial intelligence than of the unknown rational efforts of extra-terrestrial intelligence.’ It is just more likely. That is all.”

“Looking back at the worst times, it always seems that they were times in which there were people who believed with absolute faith and absolute dogmatism in something. And they were so serious in this matter that they insisted that the rest of the world agree with them. And then they would do things that were directly inconsistent with their own beliefs in order to maintain that what they said was true.”

“The scientist has a lot of experience with ignorance and doubt and uncertainty, and this experience is of very great importance, I think. When a scientist doesn’t know the answer to a problem, he is ignorant. When he has a hunch as to what the result is, he is uncertain. And when he is pretty damn sure of what the result is going to be, he is still in some doubt. We have found it of paramount importance that in order to progress, we must recognize our ignorance and leave room for doubt. Scientific knowledge is a body of statements of varying degrees of certainty — some most unsure, some nearly sure, but none absolutely certain. Now, we scientists are used to this, and we take it for granted that it is perfectly consistent to be unsure, that it is possible to live and not know. But I don’t know whether everyone realizes this is true. Our freedom to doubt was born out of a struggle against authority in the early days of science. It was a very deep and strong struggle: permit us to question — to doubt — to not be sure. I think that it is important that we do not forget this struggle and thus perhaps lose what we have gained.”

“Each piece, or part, of the whole nature is always an approximation to the complete truth, or the complete truth so far as we know it. In fact, everything we know is only some kind of approximation, because we know that we do not know all the laws as yet. Therefore, things must be learned only to be unlearned again or, more likely, to be corrected.......The test of all knowledge is experiment. Experiment is the sole judge of scientific ‘truth’”.

“A poet once said, "The whole universe is in a glass of wine." We will probably never know in what sense he meant that, for poets do not write to be understood. But it is true that if we look at a glass of wine closely enough we see the entire universe. There are the things of physics: the twisting liquid which evaporates depending on the wind and weather, the reflections in the glass, and our imagination adds the atoms. The glass is a distillation of the Earth's rocks, and in its composition we see the secrets of the universe's age, and the evolution of stars. What strange arrays of chemicals are in the wine? How did they come to be? There are the ferments, the enzymes, the substrates, and the products. There in wine is found the great generalization: all life is fermentation. Nobody can discover the chemistry of wine without discovering, as did Louis Pasteur, the cause of much disease. How vivid is the claret, pressing its existence into the consciousness that watches it! If our small minds, for some convenience, divide this glass of wine, this universe, into parts — physics, biology, geology, astronomy, psychology, and so on — remember that Nature does not know it! So let us put it all back together, not forgetting ultimately what it is for. Let it give us one more final pleasure: drink it and forget it all!”

“One time I was in the men's room of the bar and there was a guy at the urinal. He was kind of drunk, and said to me in a mean-sounding voice, ‘I don't like your face. I think I'll push it in.’ I was scared green. I replied in an equally mean voice, ‘Get out of my way, or I'll pee right through ya!’”

“What I cannot create, I do not understand.”
On his blackboard at time of death in 1988.



There are the rushing waves...
mountains of molecules,
each stupidly minding its own business...
trillions apart
...yet forming white surf in unison.

Ages on ages...
before any eyes could see...
year after year...
thunderously pounding the shore as now.
For whom, for what?
...on a dead planet
with no life to entertain.

Never at rest...
tortured by energy...
wasted prodigiously by the sun...
poured into space.
A mite makes the sea roar.
Deep in the sea,
all molecules repeat
the patterns of another
till complex new ones are formed.
They make others like themselves...
and a new dance starts.

Growing in size and complexity...
living things,
masses of atoms,
DNA, protein...
dancing a pattern ever more intricate.

Out of the cradle
onto dry land...
here it is standing...
atoms with consciousness
...matter with curiosity.

Stands at the sea...
wonders at wondering... I...
a universe of atoms...
an atom in the universe.

"The Value of Science," address to the National Academy of Sciences (Autumn 1955)

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1 comments:

RR said...

Thanks for the post...

Feynman is one of my favorites... and one of the most brilliant minds that humanity has produced in the last 100 years.