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

"The machine itself was a thing of beauty, a marvel of ingenuity and simplicity."

"We could not understand why the calculation of Lilienthal and others were so much in error."

"The machine has been proven to be a success beyond our most sanguine hopes."

"If birds can glide for long periods of time, then why can't we?"