I tell this story to illustrate the truth of the statement I heard long ago in the Army: Plans are worthless, but planning is everything. There is a very great distinction because when you are planning for an emergency you must start with this one thing: the very definition of ’emergency’ is that it is unexpected, therefore it is not going to happen the way you are planning.

Dwight David Eisenhower (1890-1969) American general, US President (1953-61)

Speech, National Defense Executive Reserve Conference, Washington, DC (14 Nov. 1957)