The danger is that when we jump too quickly to the solution, not only is the floor littered with the inventions that never worked, but we risk designing solutions that never fit the problem.

I think the answer, really, in my view, is that we cannot control them because they are smarter. As simple as that, we only know that the smartest hacker in the room will always find a way through our defences. So maybe we should stop our arrogance for a minute.

The standard models were formulated through a process that started well before computers were in place, and I would say it's undergone a certain lock-in. Once you start going down that path, it's hard to break out of it to another path. As a result, economics is stuck. It's not even that the existing models are wrong, they're just very limited in what they can do, and mainstream economists have gotten very locked in to using those models – and only those models.

The ice is neither left nor right, it is neither Republican nor Democrat, it is simply melting. The consequences of the sea ice melting are enormous and will be felt everywhere from Texas to China.

When I look at my own life- the things that I'm most embarrassed about are the moments where I acted, or didn't act, because of fear. The moments I'm most proud of are those where I acted with some semblance of courage.

The brand must not only convince prospective customers and draw them to the brand but also be deeply believed in by the employees and other stakeholders of the company. We say that for the brand to work, employees must live the brand promise.

When you have the confidence that you really are an expert closer, you're a competent closer, the word no doesn't matter, because you know that there's going to be a certain number of no's and a certain number of yes's.

My wife Freada coined a phrase, distance travelled. We're very interested in where somebody started in life, and what hurdles and barriers they have already overcome in their journey – and how that grit has got them to where they are now. That's an indicator of resilience, persistence, and many other character traits that are significant in terms of entrepreneurial success.

It forces you to confront the fact that we know almost nothing about the true nature of reality. Whatever image you have of what's real or possible is obliterated in an instant. You're faced with a world that isn't just strange, but so utterly incomprehensible that it transcends imagination.

We're creating a different type of work. The average Dasher dashes for about four hours a week, and very often they're trying to save-up for something and use it as a supplement to their income.

You are pure awareness. That's who the 'I' is. And awareness is energy. You are pure energy, which is the essence of awareness. Awareness is concentrated energy.

If it did more damage than expected—for example, if a nearby cemetery or mosque was harmed by an attack on a suspected terrorist safe house—then it could use this information to restrict its choice of weapon in future engagements. It could also pass the information to other drones.