Failure is so much more interesting because you learn from it. That's what we should be teaching children at school, that being successful the first time, there's nothing in it. There's no interest, you learn nothing actually.

If you can't be unconventional, be obtuse. Be deliberately obtuse, because there are 5 billion people out there thinking in train tracks, and thinking what they have been taught to think.

Anyone developing new products and new technology needs one characteristic above all else: hope.

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.

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.

The key to success is failure… Success is made of 99 percent failure.

Everybody recognizes that if you can make very efficient electric motors, you can make a quantum leap forward.