Intelligence is not all that important in the exercise of power, and is often, in point of fact, useless.
Two other quotes & more below the line.
Same source (WikQuote):
Most high officials leave office with the perceptions and insights with which they entered; they learn how to make decisions but not what decisions to make.
Tip of the Hat to Tim White.
See Especially:
Henry Kissinger: Military men are ‘dumb, stupid animals to be used’ as pawns for foreign policy.
Henry Kissinger: “The illegal we do immediately; the unconstitutional takes a little longer.”
See Also: