Anger is a good motivator.

Having a good idea is one thing, but persuading other people to buy it is quite another. Good inventors are polymaths: they think with their hands and their brains. They're experts in design, engineering and business.

Nobody wants the expenditure of a lease on a factory which lasts 21 years. You can't plan 21 years ahead.

I made 5,127 prototypes of my vaccum before I got it right. There were 5,126 failures. But I learned from each one. That’s how I came up with a solution. So I don’t mind failure.

Britain's great strength is its innovative, design and engineering natural ability and we're not using it.

If you want to do something different, you’re going to come up against a lot of naysayers.

One of the most fun inventions of my lifetime is the Mini.