If you invent something, you're doing a creative act. It's like writing a novel or composing music. You put your heart and soul into it, and money. It's years of your life, it's your house remortgaged, huge emotional investment and financial investment.

I learned that the moment you want to slow down is the moment you should accelerate.

Business is constantly changing, constantly evolving.

Success is made of 99% failure.

I've fought court battles over my inventions before.

Anger is a good motivator.

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.