"The role of symmetry in physics" has always felt like a tautology to me.
The study of physics *begins* with the observation that certain aspects of reality remain regular across space, time, and structure. We could imagine (perhaps?) a completely orderless world. (1/8)
A beautiful quote by Michael Atiyah: In the broad light of day mathematicians check their equations and their proofs, leaving no stone unturned in their search for rigour. But, at night, under the full moon, they dream, they float among the stars and wonder at the miracle of the heavens. They are inspired. Without dreams there is no art, no mathematics, no life.
Think you know what energy is? You probably don’t. That’s okay. Einstein probably didn’t either, at least not in the context of his own masterpiece, General Relativity. Forget the pop-sci soundbites you hear from people like NDT. Energy is NOT simply “mass in motion” or “mass because E=mc²” or even the neatly “conserved currency of our universe.” These definitions (to the degree they’re definitions) don’t hold up in dynamically curved spacetime. 👇🧵 (1/20)
استايل قيبلي الياباني للصور ممتع جدا بحسسك كانك عايش في مسلسلات سبيستون زمان !
صورتي قدام المنتجع إلي أنهي فيه الفيزيائي بولتزمان حياته قبل اكثر من 100 سنة
"And what song did they sing as they left off forever?
We must not belong to those who are gone, nor to our old selves we cannot forgive. We will go into the storms as children, with only each other's courage for comfort and the great days ahead waiting to receive us.
We will water the aelas, we will cry with friends, we will stay with trouble. It will be hydrogen hubris. It will be 'I love you, and you are gone.' It will be one more time with feeling.
All these years, we have starved for meaning, all our strength in quiet defeat.
To be a Stoic, is to see hardship as an opportunity, as a test not an obstacle, a chance to use all that stands in your path as fuel to make you brighter and better.