When I have a bad day, that has nothing to do with the market! But how I respond to that bad day may be a reflection of a general level of discomfort about how the economy is doing and so forth. It's an out-of-bounds signal. In that sense, it's pretty unique!

Limiting sleep to just 4-5 hours for one single night will drop levels of critical anti-cancer fighting cells, called natural killer cells, by 70%. That's a rather alarming state of immune deficiency, and it happens after just one night of short sleep.

Power is the ability to affect others and get the outcomes you want – and that's true whether on the individual, national or international level. You can exert power in three ways. You can do it with coercion (sticks), you can do it with payments (carrots) and you can do it with soft power – through attraction.

Quantum mechanics is the most radical break in our thinking of reality that we have ever encountered... Quantum mechanics comes along and says that whole experience is misleading, and that the best you can ever do is to predict the probabilities of outcomes. Quantum mechanics says our world is nebulous, fuzzy, a haze of possibilities until it somehow snaps to attention upon an appropriate interaction, observation or measurement.

ISIS and Al Qaeda don't radicalise anybody, what they do is tip people over the edge. The online phenomenon just speeds it up.

When you're starting out, your ambition shouldn't be defined by someone else's success criteria. That's something I struggled with, and still do.

Great entrepreneurs are people with tremendous passion. Without passion you cannot go on a journey that requires such huge personal sacrifices, looks bleak, risky and impossible in the beginning…

To me it was an adventure. I'm a hardened explorer and adventurer, and I remember the whole mission as an adventure with some awesome experiences and beautiful sights.

The strangeness of reality was apparent long before the advent of quantum mechanics. The history of science is a sequence of revelations, each showing that the true nature of things is not what it seems to the casual observer. Quantum mechanics, however, takes this weirdness to a new level.

I believe that a mission can be something grand, but it doesn't have to be. Many people say, 'I'm just busy living my life, and I don't have time for some grand mission.' But I think a mission is present for almost everyone if they take the time to look for it. I think that if you care about something, then you have a mission.

To break the silence around sexual abuse, more people need to speak about it… normalise it… and by doing so, hopefully we can start to get our children talking, and make some real progress to eliminate these acts from our society.

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.