All the normal matter in the Milky Way disc is denser than the dark matter that surrounds it.

Creativity is essential to particle physics, cosmology, and to mathematics, and to other fields of science, just as it is to its more widely acknowledged beneficiaries - the arts and humanities.

It's hubris to think that the way we see things is everything there is.

Basically, I wasn't properly socialized, so it made sense to do physics.

When it comes to the world around us, is there any choice but to explore?

One of the nice things about math and science is it’s obvious, you get the answer or you don’t get the answer.

Speculation and the exploration of ideas beyond what we know with certainty are what lead to progress.

Sometimes models are surprisingly smart.

Travel at faster than the speed of light certainly can have dramatic implications that are difficult to understand, such as time travel.

I did not set out to explain the extinction of the dinosaurs. I'm a particle physicist, and I was actually thinking about dark matter along with some collaborators.

Science is a combination of theory and experiment and the two together are how you make progress.

Confidence brings comfort and clarity.

May you live to be as old as 120 years old.

One must not believe any of those mythologies about oneself as an artist

I don't want terror in America.

When a traveler returneth home, let him not leave the countries where he hath traveled altogether behind him.

What do you care? You always liked loneliness better than you liked people. No offence liking yourself's the beginning of all love.

I want to take TSA to the next level.

Number theorists are like lotus-eaters -- having once tasted of this food they can never give it up.

Whatever that be which thinks, understands, wills, and acts, it is something celestial and divine.

Mum always taught us that compassion and kindness were the most important things in life, that it was better to be kind than right.