Being an intellectual creates a lot of questions and no answers. You can fill your life up with ideas and still go home lonely. All you really have that really matters are feelings. That's what music is to me.

Over the years I have discovered that ideas come through an intense desire for them; continually desiring, the mind becomes a watch-tower on the lookout for incidents that may excite the imagination - music, a sunset, may give image to an idea.

I bet you that over time, because we come up with new ideas to grow sales, we end up with about the same number of people making more money.

We should have a society that measures progress not just by economic metrics like GDP, but by how many of us have a role we find meaningful. We should explore ideas like universal basic income to make sure everyone has a cushion to try new ideas.

In Science, it is when we take some interest in the great discoverers and their lives that it becomes endurable, and only when we begin to trace the development of ideas that it becomes fascinating.

At Microsoft there are lots of brilliant ideas but the image is that they all come from the top - I'm afraid that's not quite right.