Once you consent to some concession, you can never cancel it and put things back the way they are.

My father told me, never have partners.

Play off everyone against each other so that you have more avenues of action open to you.

We don't have a monopoly. Anyone who wants to dig a well without a Hughes bit can always use a pick and shovel.

Passion will make you crazy, but is there any other way to live?

Do the impossible, because almost everyone has told me my ideas are merely fantasies.

I want to be remembered for only one thing: my contribution to aviation.