Alexander Graham Bell — "The nation that secures control of the air will ultimately control the world."

"I have learned that success is to be measured not so much by the position that one has reached in life as by the obstacles which he has overcome while trying to succeed."

"The most important thing is to keep on trying, to never give up."

"What this power is I cannot say; all I know is that it exists and it becomes available only when a man is in that state of mind in which he knows exactly what he wants and is fully determined not to g…"

"I begin my work at about nine or ten o'clock in the evening and continue until four or five in the morning. Night is a more quiet time to work. It aids thought."

"I have always been a great believer in luck, and I find that the harder I work, the more I have of it."