Measuring Safety

"It is impossible to accurately measure the results of aviation safety. No one can count the fires that never start, the aborted takeoffs that do not occur, the engine failures and the forced landings that never take place. And one can neither evaluate the lives that are not lost, nor plumb the depths of human misery [that] we have been spared. But the individuals with the flight controls, fueling hoses, wrench, radar or dispatch order can find lasting satisfaction in the knowledge [that] they have worked wisely and well, and that safety has been the prime consideration."

Author Unknown