Time and Memory

"This is the disconcerting conclusion that emerges from Boltzmann’s work: the difference between the past and the future refers only to our own blurred vision of the world. It’s a conclusion that leaves us flabbergasted: is it really possible that a perception so vivid, basic, existential—my perception of the passage of time—depends on the fact that I cannot apprehend the world in all of its minute detail? On a kind of distortion that’s produced by myopia? Is it true that, if I could see exactly and take into consideration the actual dance of millions of molecules, then the future would be “just like” the past?

...

Temporality is profoundly linked to blurring. The blurring is due to the fact that we are ignorant of the microscopic details of the world. The time of physics is, ultimately, the expression of our ignorance of the world. Time is ignorance.

...

I am my mother’s caresses, and the serene kindness with which my father calmly guided me; I am my adolescent travels; I am what my reading has deposited in layers in my mind; I am my loves, my moments of despair, my friendships, what I’ve written, what I’ve heard; the faces engraved on my memory. I am, above all, the one who a minute ago made a cup of tea for himself. The one who a moment ago typed the word “memory” into his computer. The one who just composed the sentence that I am now completing. If all this disappeared, would I still exist? I am this long, ongoing novel. My life consists of it."

- Carlo Rovelli (1956 - )
The Order of Time

We Are Stories

"We are stories, contained within
the twenty complicated centimeters
behind our eyes, lines drawn by traces
left by the (re)mingling together of
things in the world, and oriented
toward predicting events in the future,
toward the direction of increasing entropy,
in a rather particular corner of this
immense, chaotic universe."

- Carlo Rovelli (1956 - )
The Order of Time

What is a Wave?

"...'An object is a monotonous process.'
A stone is a vibration of quanta
that maintains its structure for a while,
just as a marine wave maintains its identity
for a while before melting again into the sea.

...

What is a wave, which moves on water
without carrying with it any drop of water?
A wave is not an object, in the sense that it
is not made of matter that travels with it.

...

The atoms of our body, as well,
flow in and away from us.
We, like waves and like all objects, or
a flux of events; we are processes,
for a brief time monotonous."

- Carlo Rovelli (1956 - )
Reality Is Not What It Seems

We are Stories

"We are stories,

contained within the twenty
complicated centimeters

behind our eyes,
lines drawn by traces
left by the (re)mingling
together of things in the
world, and oriented toward
the direction of increasing
entropy, in a rather particular
corner of this immense,
chaotic universe."

- Carlo Rovelli (1956 - )
The Order of Time

A Glimpse of Reality

"In short, [Einstein's General Theory of Relativity] describes a colorful and amazing world where universes explode, space collapses into bottomless holes, time sags and slows near a planet, and the unbounded extensions of interstellar space ripple and sway like the surface of the sea... And all of this...was not a tale told by an idiot in a fit of lunacy or a hallucination caused by Calabria's burning Mediterranean sun and its dazzling sea. It was reality. Or better, a glimpse of reality, a little less veiled than our blurred and banal everyday view of it. A reality that seems to be made of the same stuff that our dreams are made of, but that is nevertheless more real than our clouded, quotidian dreaming."

- Carlo Rovelli (1956 - )

Seven Brief Lessons on Physics

Nature of Science

"When we talk about the big bang or the fabric of space, what we are doing is not a continuation of the free and fantastic stories that humans have told nightly around campfires for hundreds of thousands of years. It is the continuation of something else: of the gaze of those same men in the first light of day looking at tracks left by antelope in the dust of the savanna - scrutinizing and deducting from the details of reality in order to pursue something that we can't see directly but can follow the traces of. In the awareness that we can always be wrong, and therefore ready at any moment to change direction if a new track appears; but knowing also that if we are good enough we will get it right and will find what we are seeking. That is the nature of science."

- Carlo Rovelli (1956 - )