You can teach all sorts of things that improve the practice of management with people who are managers. What you cannot do is teach management to somebody who is not a manager, the way you cannot teach surgery to somebody whose not a surgeon.
The key managerial processes are enormously complex and mysterious, drawing on the vaguest of information and using the least articulated of mental processes.
Professional management is an invention that produced gain in organizational efficiency so great that it eventually destroyed organizational effectiveness.
An unsuccessful manager blames failure on his obligations; the effective manager turns them to his own advantage. A speech is a chance to lobby... a visit to an important customer a chance to extrac trade information.
It is practically impossible for a top management man, or even middle management, to be doing the degree and level of work that he should be doing and, at the same time, have a clean desk.
On Destiny: "Our destiny exercises its influence over us even when, as yet, we have not learned its nature: it is our future that lays down the law of our today."
Human, All Too Human