Every three or four years I pick a new subject. It may be Japanese art; it may be economics. Three years of study are by no means enough to master a subject but they are enough to understand it. SO for more than 60 years I have kept studying one subject at a time.
Peter DruckerProfit is not the explanation, cause, or rationale of business behavior and business decisions, but the test of their validity.
Peter DruckerInstitutions mistake good intentions for objectives. They say "health care"; that's an intention, not an objective.
Peter Drucker