No part of the world can be truly understood without a knowledge of its garment of vegetation, for this determines not only the nature of the animal inhabitants but also the occupations of the majority of human beings.

Real-life people are often the hardest to play, people that you recreate who have actually lived, because you have to live up to people's knowledge of those characters.

Knowledge is power, if you know it about the right person.

With all the knowledge and skill acquired in thousands of flights in the last ten years, I would hardly think today of making my first flight on a strange machine in a twenty-seven mile wind, even if I knew that the machine had already been flown and was safe.

You should not ask questions without knowledge.