In the simplest terms, a fast-growing company can't keep growing at the same fast rate forever. It eventually has to slow down.

A lot of what people are calling 'artificial intelligence' is really data analytics - in other words, business as usual. If the hype leaves you asking 'What is A.I., really?,' don't worry, you're not alone.

Porsche's and Apple's design philosophies are similar. Much like the 356, the original iPhone was about defining a foundation for the future.

It is becoming harder for us to stay on top of the onslaught - e-mails, messages, appointments, alerts. Augmented intelligence offers the possibility of winnowing an increasing number of inputs and options in a way that humans can't manage without a helping hand.

Stories serve the purpose of consolidating whatever gains people or their leaders have made or imagine they have made in their existing journey thorough the world.

Lovers of air travel find it exhilarating to hang poised between the illusion of immortality and the fact of death.

At the moment I'm doing this space movie, so I'm obsessed with physics and space travel. I know three months down the line it's gone. Then I'll be able to superficially say stuff about space.

I do not start with a full knowledge of the facts; the whole attraction of writing history is to educate myself: it is an exploration into the unknown - 'a journey without maps,' to borrow Graham Greene's phrase.