Satya Nadella

Believe me, my journey has not been a simple journey of progress. There have been many ups and downs, and it is the choices that I made at each of those times that have helped shape what I have achieved.

Be passionate and bold. Always keep learning. You stop doing useful things if you don't learn. So the last part to me is the key, especially if you have had some initial success. It becomes even more critical that you have the learning 'bit' always switched on.

The thing about dancing - what it taught me all those years - is it gives you an amazing sense of discipline in forcing yourself to do things that you know are good for you but you don't really want to do.

The historical novelist has to consider what has actually happened, while the SF writer is dealing in possibilities, but they are both in the business of imagining a world unlike our own and yet connected to it.

Tribalism isn't a bad thing. If you're a Facebook user, or Twitter user or Foursquare user or LinkedIn user, those are all tribes... and they may even have sub-tribes. It's not pejorative, it's declarative.