Aeronautical Engineering

"We must live before we can attain to either intelligence or control at all. We must sleep if we are not to find ourselves, at death, helplessly strange to the new conditions. And we must die before we can hope to advance to a broader understanding."

"But the facts are unquestioned. The aeroplane does do these things, and if the theory does not give warranty for the practice, then it is the theory which is wrong."

"Reasoning is a retrospective business—the judging of a present situation in the light of past experience."

"Everyone knows it takes a woman nine months to have a baby. But you Americans think if you get nine women pregnant, you can have a baby in a month."

"A scientist studies what is, whereas an engineer creates what never was."