The greatest breakthroughs are missed because they look like hard work.

Time erodes all such beauty, but what it cannot diminish… is the wonderful workings of your mind. Your humor, your kindness… and your moral courage.

I don't think I'm a writer who's interested in answers. I'm interested in questions.

"The truth may set you free, but first it will break you."

The stars near the galactic center are like cosmic clocks, helping us map spacetime.