Wisdom Is an Input, Not an Output

From Chapter 1, “Effectiveness Can Be Learned,” of Peter F. Drucker’s The Effective Executive (Harper & Row, 1967), p. 5. The line sits in Drucker’s account of how knowledge work differs from manual work. A manual worker turns out a physical product: a ditch, a pair of shoes, a machine part. The knowledge worker turns out only “knowledge, ideas, information,” which on their own are useless until someone takes them as input and converts them into a result.

A well-made pair of shoes is useful whether or not its maker was effective, because the usefulness is built into the object. Knowledge comes with no such guarantee. It is raw material, not a finished product, and it does nothing until someone applies it to a decision or an action. So the knowledge worker has to supply the one thing the shoemaker can take for granted. “He must provide effectiveness.” The knowledge worker’s job is not to have the wisdom but to convert it into a result. Unconverted, even the best thinking is what Drucker calls meaningless data.