"I love tattoos. And mine symbolise who I really am. I have a Samurai on my left arm. At a subconscious level, I connect to this warrior and model myself on his discipline, skills and honour. There is also a tribal tattoo and a Chinese symbol of faith. I have seen a lot of people getting tattoos just because it's a trend."

"I’d compare college tuition to paying for a personal trainer at an athletic club. We professors play the roles of trainers, giving people access to the equipment (books, labs, our expertise) and after that, it is our job to be demanding."

"Arthur Compton became my graduate advisor. He was the ideal graduate advisor for me: he came into my research room only once during my graduate career and usually had no idea how I was spending my time."

"But compare the hardest day's work you ever did with the idleness that splits flowers and pokes its way into spiders' stomachs, and thank your stars that your head has got something it must think of, and your hands something that they must do."

"Both Obama and Romney ended up in the wrong place: the former thought American exceptionalism was no longer true and should be given up while the latter thought it was still true. Neither was willing to tell Americans that they were no longer exceptional but should try to be again."