"Why is at the beginning of time so low, and the entropy in a black hole so high? ...We ...don't know that the entropy was low ...We don't even know if there was a beginning of time. ...ntropy ...is this measure of how messy things are, so my room ...tends to get higher and higher entropy, messier and messier. Why... eggs fall on the floor and break, and not fly up and unbreak? People argued about that for a very long time until the shocking insight... that it was very low 13.4 billion years ago at the time when those baby pictures of the universe were given off... the cosmic microwave background. So our flow of time... has something to do with the origin of our universe? That... we have learned. ...f you take seriously the idea of inflation and also the theory that the does not collapse, according to Hugh Everett, you can do some math and get an explanation... but... it's a wonderful mystery, and I'm open to all ideas... and black holes... there are great truths yet to be discovered."

“So with each advance in understanding come new questions. So we need to be very humble. We shouldn't have hubris and think that we can understand everything. But history tells us that there is good reason to believe that we will continue making fantastic progress in the years ahead.”

“hat I had been missing... and what Feynman realized: physics is the ultimate intellectual adventure, the quest to understand the deepest mysteries of our Universe. ...t makes us see more clearly, adding to the beauty and wonder of the world ...he lens of physics adds more beauty to the world ...”

“It depends... on what you measure outrageousness in... If what you mean is that something is more extravagant if it... involves somehow having more particles, or reality being bigger... then sure. But... maybe the kind of simplicity that we should value with Occam's razor is rather that the math is simple. The equations are simple.”

“I... ended up at the, focusing on environmental issues. I wanted to... make our planet a better place, and felt that the main problem... that we didn't properly use... technology... I... was intrigued by... creating economic incentives that aligned... egoism with the common good. ...I soon grew disillusioned, concluding that economics was... intellectual prostitution... rewarded for saying what the powers that be wanted to hear. ...he book that changed everything: ...hat did Feynman see that I missed in high school? ...I sat down with... ... and started reading, "If... all scientific knowledge were to be destroyed... " ...I read on ...I felt like I was having a religious experience I finally got it!”

“Eratosthenes... knew that the Sun was straight overhead in... Syene at noon on the summer solstice, but that it was 7.2 degrees south of straight overhead in, located 794 kilometers farther north. He concluded... 794 kilometers corresponded to 7.2 degrees out of the 360 degrees... around Earth's circumference, so that the circumference must be... 39,700 km...”

“If I get a parking ticket, there is always a parallel universe where I didn't. On the other hand, there is yet another universe where my car was stolen.”