"I was working for Kennedy in those days, and Truman] said what I had learned from Kennedy, and I said, "I've learned that the president can't do everything he wants because the bureaucracy is the fourth branch of government." ... He said, "The trouble with Kennedy is he has too many opinions. A president has to know what he wants to do.""
January 1, 1970
https://en.wikiquote.org/wiki/Henry_Kissinger