“Scientists discover the world that exists; engineers create the world that never was.” This quote is from Theodore Von Karman, a man called the Father Of Supersonic Flight.
Here are some other quotes from the gentleman:
“I came to realize that exaggerated concern about what others are doing can be foolish. It can paralyze effort, and stifle a good idea. One finds that in the history of science, almost every problem has been worked out by someone else. This should not discourage anyone from pursuing his own path.”
“Mr. President, one does not need help going down, only going up.” (While receiving the first National Medal of Science from President Kennedy at age 81, politely refusing the President’s helping hand.)