Once you go from 10 people to 100, you already don’t know who everyone is. So at that stage you might as well keep growing, to get the advantages of scale.

Obviously everyone wants to be successful, but I want to be looked back on as being very innovative, very trusted and ethical and ultimately making a big difference in the world.

I am sometimes something of a lazy person, so when I end up spending a lot of time using something myself - as I did with Google in the earliest of days, I knew it was a big deal.

When I was growing up, I always knew I'd be in the top of my class in math, and that gave me a lot of self-confidence.

Today, if you want to access a typical out-of-print book, you have only one choice - fly to one of a handful of leading libraries in the country and hope to find it in the stacks.

As we go forward, I hope we're going to continue to use technology to make really big differences in how people live and work.

Currently we don't have plans on conquering the world.