Otto Lilienthal

“All flight is based upon producing air pressure, all flight energy consists in overcoming air pressure.”

“The fascination of the gliding flight is indescribable.”

“To invent an airplane is nothing. To build one is something. But to fly is everything.”

“No one can realize how substantial the air is, until he feels its supporting power beneath him.”

“Sacrifices must be made.”

“One can get a proper insight into the practice of flying only by actual flying experiments.”

“We are still far from the goal, but we have a safe method of getting there.”