Double-edged secrets

From the Preface...

Experience proved that intelligence functions best when limited to its proper tasks: the collection, collation, evaluation, and distribution of information concerning the enemy. Although. for best efficiency, those who work in intelligence must cooperate closely with those who use it, they must never attempt to usurp the functions of either those who make plans or those who direct operations.

As this book demonstrates, secrecy is often essential to security and continuing production of intelligence, but it is a double-edged weapon that must be wielded carefully lest it would the wielder ,ore deeply that the enemy. Restricting intelligence to "those who need to know" sometimes requires both omniscience and omnipotence.