"The sound of diesel fuel rushing through grimy pistons and cylinders below a morning-fogged window bored through his ears like a deep-water drill bit, and the thump of his own heartbeat cursed him for breaking one of his many rules."

"The daily mindfulness, consistency, and discipline is ultimately more important than the amount of time. In other words, it’s more about quality than quantity. If you use 15 minutes effectively, you’ll accomplish more than you would be able to with two hours of unfocused, random actions."

"Every infantryman in the Soviet Army carries with him a small spade. When he is given the order to halt he immediately lies flat and starts to dig a hole in the ground beside him."

"Once I get on a puzzle, I can't get off. If my mother's friend had said, 'Never mind, it's too much work,' I'd have blown my top, because I want to beat this damn thing, as long as I've gone this far. I can't just leave it after I've found out so much about it. I have to keep going to find out ultimately what is the matter with it in the end."

"I made the valuable discovery that practicing wasn't a matter of time at all. It was a matter of intensity. Five minutes spent working consciously and hard at the elimination of an error, was worth five hours just playing away ignoring errors as if they hadn't happened."