Sometimes, to relieve stress, he would soak his feet in the toilet, a practice that was not as soothing for his collegues.

Jobs has within him sort of this conflict, but he doesn't quite see it as a conflict between being hippie-ish and anti-materialistic but wanting to sell things like Wozniak's board. Wanting to create a business.

The best and most innovative products don't always win...(it's an) aesthetic flaw in how the universe worked

I've asked Jobs why he didn't get an operation then and he said, 'I didn't want my body to be opened... I didn't want to be violated in that way.'

Leonardo da Vinci had such a playful curiosity. If you read his notebooks, you'll see he's curious about what the tongue of a woodpecker looks like, but also why the sky is blue, or how an emotion forms on somebody's lips. He understood the beauty of everything. I've admired Leonardo my whole life, both as a kid who loved engineering - he was one of the coolest engineers in history - and then as a college student, when I travelled to see his notebooks and paintings.

People who know what they’re talking about don’t need PowerPoint.

Jobs insisted that Apple focus on just two or three priorities at a time. “There is no one better at turning off the noise that is going on around him,” Cook said. “That allows him to focus on a few things and say no to many things. Few people are really good at that.