The time to worry is three months before a flight. Decide then whether or not the goal is worth the risks involved. If it is, stop worrying. To worry is to add another hazard. It retards reactions, makes one unfit.... Hamlet would have been a bad aviator. He worried too much.

Original forward for the writings in Last Flight, as quoted in Lost Star : The Search for Amelia Earhart (1995) by Randall Brink, p. 85