At that time [1909] the chief engineer was almost always the chief test pilot as well. That had the fortunate result of eliminating poor engineering early in aviation.

According to recognized aero technical tests, the bumblebee cannot fly because of the shape and weight of his body in relation to the total wing area. The bumblebee doesn't know this, so he goes ahead and flies anyway.

Money lost-nothing lost, Health lost-little lost, Spirit lost-everything lost.

The helicopter appeared so reluctant to fly forward that we even considered turning the pilot's seat around and letting it fly backward.

It would be right to say that the helicopter's role in saving lives represents one of the most glorious pages in the history of human flight.

This machine was a failure to the extent that it could not fly. In other respects it was a very important and necessary stepping stone.

Our concerns sink into insignificance when compared with the eternal value of human personality - a potential child of God which is destined to triumph over lie, pain, and death. No one can take this sublime meaning of life away from us, and this is the one thing that matters.

Aeronautics was neither an industry nor a science. It was a miracle.