Cordless vacuums are designed for quick jobs, but you need enough power to do the job; you don't want the power waning over time.

A lot of people give up when the world seems to be against them, but that's the point when you should push a little harder. I use the analogy of running a race. It seems as though you can’t carry on, but if you just get through the pain barrier, you'll see the end and be okay. Often, just around the corner is where the solution will happen.

The media thinks that you have to make science sexy and concentrate on themes such as rivalry and the human issues.

There is no such thing as a quantum leap. There is only dogged persistence - and in the end you make it look like a quantum leap.

Everyone has ideas. They may be too busy or lack the confidence or technical ability to carry them out. But I want to carry them out. It is a matter of getting up and doing it.

China can and will be an invaluable trading partner to both the U.S. and the U.K.

You need a stubborn belief in an idea in order to see it realised.