"The difficulties of the problem are so great that few have dared to attack it."

"We do not intend to make a fortune out of this, but to make a machine that will fly."

"The problem of flight is a problem of equilibrium."

"We do not intend to fly for money, but for the love of the art."

"The machine had scarcely cleared the ground when it began to turn up, and the next instant it darted into the ground."