"Learning the secret of flight from a bird was a good deal like learning the secret of magic from a magician—something the magician won't tell, and the bird can't tell."

"The only bird that could speak told us what it knew, but we didn’t understand its language."

"It is possible to fly without motors, but not without knowledge and skill."

"The machine has been working very nicely and we have been making several flights each day."

"The fact that the machine has not failed in any material part is a source of great satisfaction."