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.

You've got to remember even the Apple regeneration started with colorful iMacs. So let us first get the colorful iMacs. I think with what we're doing with Lumia, we're at that stage. I want to do good devices that people like, and then we will go on to doing the next thing and the next thing.

I want to tell mayors, county chiefs and heads of big companies: don't just chase GDP growth; don't chase the biggest profits at the expense of our children and grandchildren and at the cost of sacrificing our ecological environment.

At one point, I didn't get out of bed for, I think, three months, and I went down to the bottom of the hill one day and I had to call somebody to get me to come back up - come pick me up because I couldn't physically walk up the hill.